
I buy mine (hand made from and very reasonable) Accolade Leathercraft 01278 456780 or web (sorry can't do links :-( http://www.accoladeleathercraft.com/httpsdocs/erol.html This company is at most Champ & Open shows.
I have all my Sharpei on the round leather 1/2 check with brass fittings, cost with postage around £6.00 a peice for a 14" and 16".. Lovely quality and they repair their own collars and leads for free if they ever should need it.