Your quick attatch doesn't need to be round becauce it is not rotating. I think deere uses 3/16 thick metal. I used a 3/8s piece for the top of my tool bar and cut 2 short pieces off and down to size to make the 2 hooks.
Ordered the parts today $36 total,a little more than deere parts.com,but no shipping.Also picked up shims for raising hydrauli pressure, hope I dont blow anything up. /forums/images/graemlins/shocked.gif