OK...found my invoice buried on my workbench...I've been doing so many "little things" to the bikes, the bench is getting out of control.
The part number they shipped to me is 30997MC, the description reads: Handlebar mount 1 inch mini chrome with amps plate chrome.
AMPs is an industry standard mounting hole pattern. I don't know if they would sell/exchange the plate for you. When I talked to D, I was specifically asking her about the AMPs mounting pattern....in trying to meet/determine my needs, which was a few phone conversations over a couple of days, the new plate arrived in a shipment they had just received from their supplier. Guess I just lucked out. The cost was $74.95 plus shipping.
Hope this helps!!