Originally Posted by Spoonrobot

You know how much I like t-shirts.

I also know how much you dislike most homebrew solutions, but they work so well for me I can't help but post

I printed off a couple of the pics of Evan Murphy's fridge shorts and gave them to my seamstress along with a pair of regular bibs and an old jersey. Couple days later I had my own pair of cargo bibs for a tiny fraction of the cost. I rode with them a bit and turns out I don't actually like that much cargo on my bibs. About one regular size jersey pocket is workable for me, other than that and the shorts start sagging and/or moving around while I climb out of the saddle that the chamois was sliding around and causing irritation. So I had the big pockets removed and just one regular pocket added to most of my shorts. Something to consider if you want to test it out without a big outlay for something that may not work. Or maybe even just DIY it.

Louis Garneau makes an MTB liner short but the pocket is sized for a phone as well as the shorts require an overshort so most likely too warm for you.