Strangely enough, today I happened upon a Pen F labelled as "broken" for $30. I got it working somehow, and the mirror is in perfect condition :confused:
Looking around the internet,
Dead Link Removed. The website is in Japanese only, but they sell FT and FV mirrors separately for 6,000 yen which is about USD $75. There are also numerous other Pen parts (pictured on the website.) I am not sure if they ship internationally.
... How hard is it to get to the mirror inside?
I have minor experience popping the hood of both the F and FT (over the past week.) I've attached pictures I took of the inside, with labels of the relevant parts.
The F looks relatively simple inside, and the mirror is probably easy to remove.
The FT ... not so much. Looking at the picture, the FT's half-mirror and light meter are kind of joined together , and I honestly didn't want to dig any deeper.
I hope this helps. I got my take-apart instructions from Japanese websites, which have basic picture guides. Googling in English I found almost no information.