Looking for bottom cover for Canon New F-1 AE coupler

I'm trying to find a source for this cover as mine is missing. I've checked with Pro Camera Repair in L.A. and on ebay but no luck. Any suggestions as to where I might find one? It goes where the red circle is in the attached image.

I've usually seen the covers in sets of three on eBay. Haven't checked recently.

I got some from here for one of my New F1's Tony fairly recently from this company in San Diego http://www.procamerarepair.com/ it must be the only place in the World who still has all three of these covers for the New F1, butyou need to trawl through all the spare parts list to find them hope this helps.

Here it is found it http://procamerarepair.3dcartstores.com/MANUFACTURED-CANON-F-1-CAP-AE-COUPLER_p_1015.html

Thanks Ben. That's what I need.

Tony