In the U.S.:

http://www.porters.com/catalogsearch...ed+film+labels

(I haven't used them personally, but don't see how you could go wrong.)

Light leaks/reflections seem to be an issue with the Epic/MJUII. I've had several and more than one have given me a weird reflection, seemingly off the paper 'frame' thingy that surrounds the lens on the inside. I've never figured out the problem and it is infrequent enough to not worry about.

I have taken some nice slides on Velvia with my Epics but really love the prints I get with good 400-speed negative film. Have fun with it.