You might try Numrich firearm parts for your magazine. A Browning Baby mag will probably work simce the bauer is a copy of that pistol. I had one and it wasn't dependable. neat looking but would always jam. I probably could have got it to work more reliably by adjusting the lips on the magazine but got tired of messing with it and sold it off cheap.
I got a mag for mine at a gun show, was a generic mag and it would only work for the first three shots, after that it jammed, actually even the factory mag jammed, but you could get a fourth shot off before it did.
I finall sold it for $25 less than I paid and felt I got the best outta that deal!