Wow. She's quite the butterface. (Nice body, but... yeah, you get it ;])
You could always sew yourself a holster out of leather. It'll be a pain in the ass but it'll be just how you want it
Make a pattern out of cheapo material or paper to get the shapes and fit right, and then replicate that. Or you could try and find a similar holster if you're not so talented and not so much a detail maniac. It looks like some sort of Han Solo ripoff to me :P Try looking around for that!