as close as a heavy weight paper bag from the kitchen, I think there is one in my gasket leftovers if you so desire, send me the od of the plate and number of screws. Or you could just use black silicon gasket maker and follow directions on tube, which is what most of us would do. No kiddin on the bag paper, I wo
rked for a paper company and made tons of it. Bag materiel with a little extra sizing (starch) in the mix to keep oil from migrating thru the paper.