Goosing this post.

Based on the thread, I took a drive to my local surplus shop down the street. I found a Cross Over Thigh Rig which in Coyote Tan is pretty close to what I am looking for. They only had ACU so I didn't get it. All photos I have seen online, make unit look smaller.

The top strap is a waist strap. Lower is a leg strap. I had a 1L Nalgene with me and it fit very loosely into the main compartment and the cord lock cinched it in. Along with the bottle it could also fit quite easily a modest EDC, considering it has exterior slots for flashlights, etc. Could fit a base compass in the zipper pouch on flap. Pretty deep pocket with zipper on the outside to fit a map or in my mind hide low fixed blade.

For the cost, I may invest and see how I run with it.