I assume you meant "camera" here, not "back".
The Sinar prisms modified for the Sinar revolving back are available (I have one).
Thanks Brad. I did, of course, mean "camera." !:^)
But, on current availability, I was talking about getting a 6008 45 degree prism modified to fit the AFI/Hy6. because it seems like the OP was interested in using a 6008 prism.
I, myself, have a 6008 prism which I want to use on the Hy6 I plan to buy. The prism is the same as the Hy6, but it's base needs to be replaced to fit the Hy6. As far as I know, Sinar is not doing this modification yet nor have they set a price on it. I'd like to hear if this is incorrect.
Best,
Mitchell