Originally released in 1979 on a small label called Sunshower, then re-issued that same year on Leomini, the original single for "Come On And Rock" is on sale now for $2000 on Discogs, and $2300 on Gemm.
Good luck with that!
I found this new re-issue on Dusty's Rusty Disco label last week for $10.
You may have heard this on the Baldelli Baia Angelli Vol. 1. CD.