SE vinyl top trim is tough to find but it's out there. the clips are availible from R/T specialties. something to think about if you're not in love with the SE top is to just put a standard rear window in and use the eaiser to find standard moldings. if my car wasn't an original R/T SE I would have tossed the little back window I don't like it.
Restoring trim to show quality is an art form, with the proper tools like a files, trim hammers, sander and good buffer it can be done by a novice but expect mixed results and some trashed trim. I've gotten pretty good at it but it was a struggle to even get to the level I am and that ain't a pro. dented and scratched trim you can fix, if it's tweaked or kinked have fun I know I can't do it. crappy trim can ruin a 25 K paint job, restore what you can and farm the rest out to a pro.