Hi and welcome.
Your quest will be a hard one as the leather parts of the bracelet are fixed into the clasp and I haven't seen any replacements recently.
The clasp/strap combo almost seems to me to be a single use item, or is it that the straps are replaceable?
You may be able to find a suitable leather strap and by cutting off the right amount and fixing it to the clasp.
If you post some clear hi res pics of the inside of the clasp I might be able to come up with some ideas.
I'd also suggest setting up a few searches on eBay and biding your time.
Good luck with it.
Cheers
Jim
PS: Maybe
@Tom Dick can advise?
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