Somehow, I must have missed this thread when it originally "aired", so I am personally glad it has been resurrected.
While my January 31, 1967 is a little later than John's and Marty's, it interestingly has the same self-tapping hex head bolt and toothed washer as John's 7R01C120xxx example. I believe that this is way too coincidental to have been a "fix" by a PO or mechanic. My first thought is that this is another one of those many "1967 running changes" that occurred throughout the 67 Model Year. Another thought is that it could have been the result of a TSB or Special Service Letter, although I do not remember seeing such an "animal" in the TSB's, yet this will prompt another look. I couldn't find this strap in the 1967 MPC, the 1960-68 MPC, or the Assembly Manuals. Did I just miss it ?
I too, would like to know where to get the reproduction, as mine is mostly missing (see picture), yet the one posted by Marty appears too thick. And speaking of too thick, John, in your original Post, I assume (?) that you had the decimal point off, and it should have read "0.15-0.1625", correct ?
Once the thickness is verified, if the correct repro is not available, I plan on buying a cord reinforced rubber sheet and just cutting it to the correct width and length.
Bob