as for ordering lexus parts for an altezza, my guess is email the people that run the site, chances are they would know if it's possible to to fit parts onto the altezza.
i wouldnt put a nissan engine in a toyota or lexus. good idea, but the base supra engine has the same power, and is probably cheaper. plus using a toyota engine parts are plentaful for the conversion, using a nissan eng, provided if it's even possible, would take some forcing in my opinion.
jamaica eh, my parents went there for there honeymoon, they said they've always wanted to go back, if they do i'm gonna def go, especially if there are real altezza's there. hell maybe i'll buy a house just so i can buy the car.