Ah, it looks like you’ve got a Sterling, the kind that used to be called a Sub Ray 4, but is now called a Sterling Stingray 4. Just to confuse matters.
I have one of these basses, and I’ve also been looking for a replacement bridge. There are near copies of the real Stingray bridge on eBay.
I got one for about twelve quid, and found that it looks better, but the string spacing is too narrow, by about 3mm at the bridge. The build quality is about the same. I attach a photo of a similar one, but with Sterling logo.
I am going to try drilling or filing out the stud holes, so that I can use the wider spaced saddles from the original (as in your photo).
Some folks have tried the Badass II bridge, with good results.
Hope this helps!