Vinyl die would be my first choice for painting it. I got my new one from Dante's Parts. His shipping is much less then Year Ones. However my new one doesnt fit all that great. Its about 1" short.
I did a search on the subject and I sounds like most have had a problem with
the repro's fitting, which seams strange since Its would seam like one of the easies parts to repro. maybe I'll try the dye on a small area before I do the whole thing.