Well I misplaced my PENTAX LARGE EYE CUP O-EC107 and had to call Pentax that informed me it could take up to 6 weeks to come from Japan, But.......they could get it for me. Luckily I found it.
Pentax was great to talk to on the phone and I found them to be very helpful in fact I did not realize they were still making some of there old 645 lenses, kind of nice to know!
Dan
I can get a brand new 645 FA 35mm for $2300 Can.