I'm still looking for a 135mm Optar rear element or lens.
I will consider a complete lens/shutter if the price is reasonable and the lens and shutter are in very clean condition. The rear element must be as perfect as possible.
PM me. That should be easy enough to find - I must have a half dozen or more. I'll try to find one where the front element is shot so I can just sell you the rear. Make me an offer and its yours (need to clear space in the house so this is just the start of my spring cleaning. oh, and lost my job effective yesterday - anything else you're looking for?).