Saw this on ebay, it was one of a pair but the other is a funny pinky colour, and they were mine for the princely sum of £7.23 for them both including postage! Bargain. Slightly too narrow but doesn't show that much at all and a bit of a squeeze for the tubes but they fitted with a bit of teasing.
It's amazing how a different colour/style strap can totally transform the look of a watch. For most of the time I use the 107 as a smart work-watch but with this strap on, it looks equally at home as a casual weekender, (even though I'm at work today :0( ).