Exakta pentaprism finders needed

[P3D E R Swanson <ers@xxxxxxxxxxxxxxxxxxxx>]

I'm trying to convert a Pentax Stereo Viewer 2 into a stereo finder for an
Exakta (e.g. I'm trying to make a finder that functions like an Exakta
Stereoflex). This is also going to involve minus diopter correction to the
viewer, but I can go to the local optician and test for appropriate
correction with his test kit, which goes in quarter diopter increments as
I recall... 

I need a few Exakta pentaprism finders for the VX IIa to experiment on,
preferably ones with the normal ground screen (all the screens I've seen
for the pentaprism are plastic and interchange). (The waist level finder
won't work for this purpose.)

If anyone has some or knows of a source, I'd appreciate the information.

Exakta finders ought to be pretty cheap...

Thanks, Elliott


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