So, I'm thinking about trying a Perlon strap, and the perfect candidate is my Omega FOIS, which currently has a 20mm Omega Rallye strap squeezed on in between its 19mm lugs. I've only found one so far, from Fluco:

http://www.amazon.com/gp/product/B00...A2DEVWTUUIUCCB

I may go ahead and try it, but was wondering if anyone knows of any others--everything I've seen seems to be either 18mm or 20mm. So right now I'm in Henry Ford land--I can have any color I want, so long as it's black.