Here is a simple device that allows the use of ALICE-style pouches and accessories on a MOLLE-type platform:
Here is the back:
These are made in the USA by Specialty Defense Systems. The assembly isn't exactly precise, so it doesn't lay flat when the straps are fastened:
Here it is on a MOLLE seat panel:
Despite them being imprecise and a bit lumpy, these adapters work pretty well. ALICE clips hook to them snugly and don't "walk". Here I have used one to attach a pistol mag pouch to a Maxpedition 10x4 Bottle Holder:
I got these adapters on eBay for about $3 each, but could be found at most military surplus stores. They are small and light and a good addition to any kit.