Tire Rack stocks a limited selection of 255-50-19 / 285-45-19. There are numerous other tires available if you search, ContiSportContact 5 SSR & Yokohama Advan Sport come in the E53 19" stagger size to name a few.

__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!