It's not labour hours, it's the cost of the product that goes up to allow for it.
And besides, all that would happen is that they would just make sure they only used quality suppliers which is why the quality workshops use brand name parts rather than dodgy china crap. They are happy for internet sellers to sell that stuff cos they know they have a high success rate with the brand name stuff. Ie; it just works.
Anyway, Aaron should come on here and give us the final part of the story shortly. Everything was sorted out and there was a complicating issue which hasn't been mentioned already.
All that has happened is that he just found out that owning a GTR isn't cheap.