You might consider going to your local thrift store.

It might take a few visits, but you will find big and small pots and pans there.

You don't specify how you will store or transport them, but if you don't want the handles, you can shorten, remove and toss, or store them separately, or replace with a wire bail.

Just a few bucks and you can have a nice backup set.

I read that the Altsheimer link was discredited, but I can't remember where.......

You might consider going to your local thrift store......