Hello Graham, we are an Authorized Dealer for all the gear we carry. If you go to http://www.scuba.com/resources/warranty_info.asp
that is the phone number to each manufactures customer service. You can ask them directly if we are a dealer for them. As for the TUSA BCJ-7000 that is one of the current models we regularly get in from them. Right now we are out of stock in all the sizes but if you placed an order for one today we should have them in on 5/7/2012. If you have any other questions please feel free to give us a call at 1.800.347.2822.