I was going to install one of the Radio Shack rectifiers but after acquiring three heat sinks and two rectifiers, I lost my patience and ordered a modern repro from Retro Bikes for $40 or $45. It looks great and I just bolted on the new bracket that came with it (good thing because mine was pretty rusty )and then plugged it in. Very nice! Jeff H.
Bye the bye, if anybody wants one of the Radio Shack Rectifiers, I have two. Send me a pm and you can have one.