We've actually been talking for a while about making some straps out of Dennis' collection of leather pants from his club days in the 80s. They'd be practically waterproof as they've already absorbed as much moisture as they ever could. They'll be split into five collections, each named after a nightclub in the south Philadelphia area.
You can buy one of thee straps from this Parisian Aftermarket watchband maker. They are a really nice company to deal with in fact I am going to suggest that they might do the same thing with Rugby Balls, could be interesting http://www.abp-paris.com/watchbands_creations_watchstraps.php?rid=7&cid=1 Photo, an example of a watchband make from a basketball by the same company