Cables are easy to swap so I'd say just choose the shape that works best for you and buy a paracord from CeeSa, paraflexcables or paracablemod, alternatively you could even make one yourself. Mouse cables are also sold for next to nothing on ebay and aliexpress but it's a bit more tricky to work out whether they fit your mouse or not and they might not be as flexible as a "true" paracord cable either.