You may be able to pirate winders from a home movie editing set up. They turn up frequently at thrift stores and run pretty cheap. As long as it doesn't turn out looking like a Rube Goldberg machine you'll be good.
I spent a little while throwing together a prototype of the small plexi punch tonight and it seems like it's going to be a go. I need to clean up the edges a bit but it's working pretty precisely. Should be easy to use in the dark too. For a catch I used a styrene spring bar with a styrene pin with a rounded tip. I'll look for a ball catch small enough for a future revision.