We buy all our collars and harnesses leads and equipment from these guys (link above). They are very professional speedy and more importantly stock some of the best items ive ever had. All thier items are hard wearing and strong, no more broken collars.
They stock, weightpull harnesses, Weighted collars/harnesses, collars, tug toys, dog walking belts, mushing + bungee leads and more. You can even have them customised with names on them. They are very nice people too. Speedy delivery and fantastic prices.