The Stovebolt Site Forums The Shop Area Paint and Body Shop Radiator Stand to frame mounting question

So as we all know, on the Advance Design trucks, radiator stand is the foundation of the front clip. In removing mine, I expected to find the spacer between the bottom of the stand and the top of the front cross member. I did. I was also expecting to find a washer or two. I didn't, but that's not a big deal. I did, however find the anti-rattle "gasket/grommet" between the bottom of the stand and the top of the two-hole spacer. It appears to be a reinforced rubberized canvas or something -- and not quite the same material as the fender welting, either. Are replacements for this available? If not, what would be a suitable replacement?