Carlos,
I have a 55 Canti Rom that's a little rough around the edges with dents and paint chips. Currently frame, fork, hs, bb, stem, & noodle bar. I'd let go cheap. Might not be a show winning Riv, but I think would serve well if even as a placeholder for a finer one.
Drop a line if you have any interest, I can provide more details and pics.
Cheers,
Brad