Reddit reviews RAPDOM Tactical M.O.L.L.E. Panel, Black, 24" x 32"

I did a DIY version of this using a MOLLE panel and higher quality bags. Looks like the same first aid bag. It's been through 3 years of various weather and no problems yet.

Here you are! https://www.amazon.com/gp/product/B01F42XK6Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

If you want a custom sheet check out these guys, although it's going to cost you a lot more than $30 :'(

http://www.wildecustomgear.com/store/molle-safe-panel-organizer

MOLLE system (MOdular Lightweight Load-carrying Equipment) is standard military mounting system, can be rigid or cloth. https://www.amazon.com/gp/aw/d/B01F42XK6Y/ref=pd_aw_sim_200_of_59?ie=UTF8&psc=1&refRID=JQ0Q76FMXZ37MNEFGN8Q

Maybe a MOLLE board like this?