Can't help you much on Long Island but you might want to check with BTS (Brians Truck Stop) and see if he has a distributor in your area. Or what they can do for you if you want to install it yourself.
Other than that check out this link and see if there is a ATRA shop in your area to rebuild it for you.
Other than that check out this link and see if there is a ATRA shop in your area to rebuild it for you.