David,
Now that you mention it...I believe that you are correct. I was not thinking of the 1/2 inch additional above the original enquiry. Yes, I have seen that size on Ebay from time to time...infrequently since they are not very common. There is a fellow or camera store in the pacific northwest (Seattle if my memory serves me) that has listed that format camera and holders from time to time. Thanks for bringing that up.