Woot, I know how ya feel! I have so many Munnies that are in limbo due t school and funding but I have so many ideas for them! Speaking of Vinyl, have you ever experimented on those cheap-o Munny knock-offs that come in rather...FUNNY shapes of their own? I have a few of them since their dirt cheap but I found that they work just as well, even if their shaping is a little off and some of them don't have movable limbs.
Yeah, Rose-Arts has their own brand which can be found at art stores and other retail places and I know that Michael's also has their own brand, which come in standard Munny size and minis. I have a few that I got on sale from Halloween which I want to use since for knock-offs, they're actually pretty cute and the RAs brand takes acrylic well (I heard they don't do well with markers)
And here is the Michael's/Artist Loft knock-offs; [link]
I actually like having more opitions like this, even though the Munnys of course look cuter! I haven't seen a knock off that can capture the cuteness and overall design of the Munny and Trikies, and NO ONE has made a good Dunny/rabbit knock off.