I had a simple idea one night - o-rings to fill the gaps. I dont know if this has been done before, and i havent searched so my the solution...
Did a search, and knew I needed thin, pliable and small diameter o-rings, with one on each side of the strap.
Found a site: O-ring Warehouse at http://www.oringwarehouse.com/?gclid=CI ... 4Aod9BODfw and did a guessing game on sizing and ordered a few sizes. Unfortunately you have to order a minimum amount, but it is very cheap. The winner turned out to be AS568-003 rings (I ordered the nitrile).
Installed on my 187 (and soon 372) with the Micah French Canvas and here are the pics...



Dont think it looks too bad, in fact pretty good in the end. Dont really notice, and I tend to wear darker straps anyway.