I order mine through a guy that makes them by hand. I found him at an AADR Show in Belleville Michigan like 6-7 yrs ago. He specializes in Pit Bull restraints and I have been ordering collars, weight collars, leads and conditioning harnesses through him ever since. Ive never had one fail! He also does pulling harnesses too.
35585 Chestnut Ridge
North Ridgeville, Oh 44039
If you look at the pix on this forum of Clarks chosen one he is wearing the 2 inch collar. (the red and the blue collars)