Need Diaphragm Ring for 300mm F2.8 ED IF

My older 300mm 2.8 ED IF Ais took a nasty spill, Pro Camera in Charlottesville is working on it but I need a good diaphragm ring to complete the repair. I would entertain another unrepairable lens as long as that part is in very good shape. Any help would be appreciated.

Good luck finding this, and I really mean it. Repair issues is the main reason I've heard people mention as a reason to buy newer lenses than these.

Have you looked at ebay and Craigslist?

WM