This was the first hit I found on google for "browning BDM 9mm holster". It looks like they have a decent selection. Also, for those guns that it's hard to find a holster for, don't rule out Uncle Mike's "universal" holsters. No, they're not form fit to the gun, and you're stuck with a thumb break (all thoughthe only type ofthumb break that I, personally, will use), but they are good quality holsters.
Does the BDM shoot well? Is she accurate? Reliable? If so, I wouldn't get rid of her. Get another handgun? Sure
but don't get rid of a good gun just because the holster selection is scarce lol.