My ring (for my v1 lens) is broken EXACTLY the same way! I broke mine last month and have been trying to fix it at home. I tried glue, but it won't tighten. I try tape and it actually was able to stay in place better. I sent it to a place to repair... $175!!! They said that canon sold there's for 105... (I had another part broken on it also)I hear you man. I was able to buy a genuine mint condition collar for $50 on eBay
. But I must say I was pretty miserable up until that point. I had to wait about 2 weeks to find one.