I used to have a Bersa Thunder 9 and the Thunder 9 HC and looking at the Pro versions, they look very similar. There might be holster fit issues with a hard molded plastic holster like a Fobus but you don’t want a Fobus anyway. They look similar enough that you would probably be good with a leather Galco holster or similar. Just a guess though, as I have not had that gun in a long time.