I agree, this market would be plenty harder. Sure there are PLENTY of rich people with cars here, but its all about how you market it.

One of the best things you could do is get a partnership with a company that is a widely known racing division...say, something along the lines of WRC, where you constantly have to shift, and proper performance and reliability is 100% crucial. Or maybe, if you are lucky enough, you can get into NASCAR and try your product there with Ford or something (nothing against Ford, they just ahve the strongest ties to Europe IMO).

Find a mass market where people will notice your transmission and the results of your hard work and research. Heavy advertisement will definetly be a key in this. One idea may be to show off a vehicle with the modifyied T5/T56 at a WRX convention or meet, where your next croud would be. But thats just my opinion, I know how annoying it can be for people to give outside help on something they know nothing about that goes against your wishes.

Again, good luck. I've had an idea of creating an online shop myself, although I highly doubt I'll ever get to it, I'll keep you in mind as a parent company for me to be a distributer.