Just put it on eBay
I also have one of these where the strap broke, there really not very good are they
After trying to find one from the manufactures and lotus getting nowhere I managed to find someone who would make me one.
got it from this guy http://www.steveostraps.com/ and pretty much got to choose what ever colours and style I wanted.
Looks good, yes the stock straps are rubbish.
I was reading a post on SELOC a few months ago how someone was asking about the straps as the one they had broke up. I felt smug as mine was in the draw good as new…
Took it out the box and the strap fell in half in my hand, Opps