No, I have never attempted to breed them. Though they seem to try all the time to. Maybe I have all males. Maybe I should get some more, but I find it hard to get fire-bellies that will survive. Being wild caught, they are loaded with paracites and I find most don't survive. My current trio are paracite free and I want to keep it that way.
I have never seen any other Bombina for sale.
Kurt