hello,
while i read through the thread, i keep thinking UC-Hexanon 35/2
a japanese seller sell new old stock for 899US on the auction site, and i have hard time refraining myself clicking BIN button... actually i clicked it once, but step back without confirming the purchase, i am planning for a travel trip...
it makes much sense with the 40mm suggestion, too
i have a summicron-c bought from a member here, very good for both color and B/W in my limited experience
hope you find you lens soon!