They are produced near where I live (Niagara Falls USA). When I get time I will look up the address for ya.
OK Udate, I called Buffalo Drum Outlet in Buffalo NY. They sell a box of 12 pair @ 6.75/pair. You do the math (81.00) box.
Buffalo Drum Outlet
934 Walden Av
Buffalo, NY 14211
Phone: (716) 897-0950
He says Regal Tip don't sell direct to the public.