Outer Limits 4x4 Board

I am doing the head gasket on my 3rz and checked the clearances today before removing the head to find all of the exhaust valves are between 0.001 and 0.004in ...way too tight
Just wondering if any of you guys have bought the replacement shims, can I only get them from toyota and how much are they?

if you don't want genuine, most engine reconditioners keep them it stock or you can have yours machined.

you can measure thickness's of each shim and swap them around into other spots to get the right clearances to save a few bucks, the others can just be machined.