Duh, you're right they are in upstate NY near Corning, which is a long way from Long Island. For some reason I always thought Horseheads, NY was on the island. I found these listings in the Long Island area (may be outdated so call ahead):
Mattituck (eastern L.I.) Racehampton
Contact: Andy Morris
Address: A & P Plaza, Main Road, PO Box 810, Mattituck NY
Telephone: 516-298-4088
Notes: 4x16-foot 6-lane Bucktrax (with 1/24)
Mineola Long Island Train and Hobby Center
Contact: Jerry Nappi
Address: 192 Jericho Highway, Mineola NY 11501
Telephone: 516-742-5621
Notes: In store
Port Jefferson Raceway (1/24)
1844 Route 112
Coram, NY 11727 U.S.A.
1-516-696-7721
Slots-A-Lot Hobbies (1/32 - 1/24)
45-65 - 168th Street
Flushing, NY 11358 U.S.A.
1-718-461-8283
Shortrax Model Car Raceway, Inc.
461 Amsterdam Avenue
Patchogue, NY 11772 U.S.A.
1-516-447-2930