I need to update and buy a few things, and I want to avoid giving all my money to one gigantic online store. So help me out here: where do you order your emergency stuff these days?

Sadly, Amazon.
-Blast

Mostly Amazon. Occasionally Cabela's. No longer REI.

I generally shop around to see who's cheapest including shipping. More often than I'd like, it's Amazon given we do Prime. Although, sometimes the cost even with prime is more than other sites with free or inexpensive shipping.

On the plus side, as I use AmazonSmile, Knife Rights Foundation also gets a 0.5% donation for almost all the money I spend there.

Details for anyone interested.

Shop Amazon with AmazonSmile at smile.amazon.com/ch/74-3197994, or with AmazonSmile switched "ON" in the Amazon Shopping app, and AmazonSmile donates to Knife Rights Foundation, Inc.

To sign up for AmazonSmile supporting Knife Rights Foundation, Inc., sign up on your web browser. Go to Amazon.com and simply select AmazonSmile and then select Knife Rights Foundation Inc. to start generating donations, at no cost to you.

To use the app for AmazonSmile, download or update to the latest version of the Amazon Shopping app on your phone. You can find it in the App Store for iOS or Google Play for Android.

Then just turn on AmazonSmile by opening the app and find "Settings" in the main menu (☰). Tap on "AmazonSmile" and follow the on-screen instructions to turn on AmazonSmile on your phone.

I forgot to mention, I often times check the manufacturer's website for direct sale if I find something on Amazon. Quite often I find that the Amazon price with "free" Prime shipping is almost identical to the manufacturer's lower price with normal shipping charges. Amazon is just burying shipping charges into the base price.

This is not always the case, and you will indeed find some things cheaper on Amazon than the manufacturer's site.

Also, for things where the newest version is good but previous versions are maybe not as good - I buy those direct from the manufacturer to avoid potential issues of older product from Amazon. This is not usually an issue for emergency/survival/prep gear which this thread is about - more so for electronics. But I do not always trust Amazon to deliver the latest and greatest version (more so their third party sellers).

Generally, I usually buy either from a large company (Amazon, Cabela's, etc.) or directly from the manufacturer. I admit to rarely buying from small businesses (except locally - I actually seek out small businesses in my neighborhood). I have been disappointed several times to get a shipment of obviously used/returned merchandise from small shops. You can't blame them all for bad practices like this, but it does give you pause after you've been bitten by this on multiple ocassions.

Most of my supplies come from Sam's Club, followed by Chinook Medical Gear.

Jeanette Isabelle

I've purchased some supplies from these guys...
https://www.rescue-essentials.com/

The pre-packaged kits fit a need I had and the quality was excellent.

Overall, I've been using Amazon for 'ideas' and then sourcing the actual purchase of the product direct from the vendor when I can thus bypassing Amazon or I'll try to find a local source. I have to admit however, for some things it's just quicker and easier to get some things from Amazon (while holding my nose!)...

Sometimes I find good stuff at sierra.com

I try to avoid buying anything from amazon. I've gotten some stuff from countycomm.com and more recently illumn.com (flashlight stuff) and meh.com (sort of a successor to woot). There is also sometimes worthwhile stuff at Harbor Freight and REI, or better yet, local shops such as hardware stores.