mswantak will probably be able to get you hooked up with what you need. One word about Simplex rear derailleurs though. The original jockey wheels on it will probably be toast, if they haven't already been replaced. I was a bit skeptical because I have a complete old one (with a home) that seemed fine except for being dirty. When I cleaned it up the other day, I noticed that the jockey wheels had "Sun Tour" written on them. Anyhow - I have an old simplex body that does have the disintegrated originals, and also a Sun Tour (actually a couple of them) that I could transplant the wheels from. Let me know if you want/need the parts.