How much is he charging for this? The guy at cadillacforums.com that is doing it has been testing them and they keep failing eventually so he won't sell em until he gets it right... are you sure this has been through enough testing?
I'll post all the info, including a 'how to' do it oneself in a separate thread later... but the leds were tested being on for an hour straight (which obviously doesn't happen in RL conditions) without failing and and within heat tolerances.