Does anyone know where I can get new brava dooms?

I'd say either direct from Brava or try Ebay. In the longterm Brava works out cheaper even if you have to buy the set from them (to be honest you only need the domes) once you buy the set you can buy replacement domes cheap. Ebay know you can only get cheap domes from Brava if you bought the set so they sell at almost double price. At least with Brava you get a warranty. If you do buy from elsewhere make sure they are genuine Brava domes and brand new with the plastic cover still on them.