Mini firestorm 9mm magazines

Howdy y'all. New to the site but not to Bersa. The wife recently took over my .380 firestorm as her CCW. I was in a pawn shop thinking about a baby Glock as a replacement (I know, don't say a word). But guess what I find for a very reasonable price? Yup, the mini Firestorm in 9mm. Took it out the next day and went through 3 boxes of fmj's with no problems and great accuracy. Even my 11 year old fired it with excellent control and results and no worries about recoil, and he's a small framed young man.
Here is my question: Where can I get a spare magazine for this great pistol? And are any of the other Bersa 9mm magazines compatible? Thanks
Frank