1970 challenger irreplaceable parts?

Hello! I have an L code ‘70 challenger. My last mopar was a 67 charger I goofed around with as a teen. That car had several super unique oddities not in reproduction (grill medallion, fender blinker resin thing, door panels). Getting into the e body world it seems just about everything can be bought aftermarket. Is there any substantial important things to keep my eye out for? Thanks so much!
Author: Sour