I have Manilla Folders. You have to mod them. I can send you some no problem. I am not 100% happy with them, but they work and so far the only option. They also were not cheap, and have to be bought in bulk. I will need to check my stash to see what I have for the clear pouches. I need to keep enough for my complete second set to sell, and some kits to put together to try to re-coup some of the cost.
I have not ordered the second top opening manila file for the second file yet.
I would be happy to chip in as well for the custom pouches.
For Paint I am in love with Rust oleum 2x Ultra cover paint + primer. I have been very happy with results on everything including the test clear pouch I did.