I ordered from Nocrowroostercollars.com, they only sent me 2 out of the 3 I ordered. They still have not responded to multiple e-mails after almost 2 weeks. Not extremely happy with that.
I am, however, very happy with the collars I received from them. They virtually eliminate the volume of the crow on both roosters that received them.
For my third roo, I grew tired of waiting and made a collar out of velcro that works just as well. I had some of this laying around:
http://www.amazon.com/gp/product/B00006IC2T/ref=wms_ohs_product?ie=UTF8&psc=1
I cut both components (the hook strip and the loop strip) in half width-wise, to roughly one inch in width. The backsides are coated in extremely sticky glue, so once I stuck the hook strip and loop strip back to back it formed a very tight bond. So I now had an 8 inch long (I cut to that length), one inch wide strip with the hook side and loop side. Once wrapped around, it would stick to itself. I put this on my roo's neck and it worked just as well as the purchased collars. It was a little harder to adjust, but did the trick perfectly and cost me less than $2.
I know that explanation is somewhat hard to follow, but if you have the velcro in front of you its not too hard to figure out. Hope this helps somebody.