The definitive answers, from someone who's seen the movie countless times and knows these kind of things:

Morrie the wig salesman was indeed killed, but it was after Jimmy (DeNiro) decided to not kill him that same night. Tommy (Peschi) killed him because he wouldn't shut up. The guy killed with his wife in the pink caddy that the kids found was named Johnny Roastbeef. Morrie never got his share in the first place. The other bodies found during this time were Frankie Carbone (in the meat truck), and Frenchy was in the garbage truck.

Vincent Pastore (Pussy) was in the movie, he was the guy with the coatrack.

And, if you look a little hard, the Goodfellas soundtrack is still in stores. It's only about 40 minutes, and it's missing some songs, but it's worth buying.