Generation IV External Engine - Where can I get valve spring shim spacers 1.437" OD, .645" ID x 0.120 thick & 0.160 T

I need to add aluminum spacers under my valve spring pockets that are 1.437" OD, .645" ID and I need them in two thicknesses; 0.120" & 0.160" thick....any idea's where I can get them? All I see are shims 0.015", 0.030" & 0.060" thick!

we have made them before. I think we charged around a hundred bucks for 16. See if a local machine shop can make them for u if you cant find them