Is there any easy way to adapt a "wedge mount" type rear view mirror to fit in the camlock slot found on the winshield of a 2002 WRX?

My auto dimming rear view mirror quit dimming. I got hold of another one to replace it, but the replacement has a wedge type (CIPA?) base. The mirror mounting point on the winshield of my '02 WRX is the camlock type. Does anyone know if an adapter exists to handle this situation?

I'm trying to avoind buying a brand new replacement auto-dimming mirror because their kinda pricey.

Thanks for any ideas.