Valve spring shims

[4x4toys]

Refreshing a set of cylinder heads for one of my 6.2 diesels. Having a hard time locating valve spring shims so I can restore installed height. don't know thickness needed yet, waiting on cutters for my neway cutters. My original shims measure 1.245 ID x .785 ID x .035 Thick. These are not a popular size. Any info on locating some would be great. Thanks.

[More Power]

As I recall, measured valve spring height should fall within a certain specification. If not, they are replaced with new. Jim