Gearsets Dog/Synchromesh

Hi everybody, I have heard of a company that manufactures billet synchromesh & Dog mesh gearsets for the B & H series manual boxes in Australia. The name is PAR the web address is www.par-engineering.com Apparently this company is supplying allot of serious racers in CA and they are having great success & are cheap apposed to other companies with good warranty.
Has anybody used these, I would love any feed back.