Allot of the after market places as the companies I mention sell the plate or you make a plate from a sheet of alley plate and a gasket and cut it out,20 minutes and you save your self 13$ and shipping and handling,Mrmopartech
Looks like good quality, But I am on the side of being a cheap skate. I have made all my own stuff up till now. Going to start my Home made cal-tracs soon!