Need help locating flex plate shims for my 57 Eldorado

[ACME Garage]

I have a 57 Eldorado (365 dual quad) w/ Hydramatic Tranny.  I removed the engine & tranny and had both professionally rebuilt.

They are ready to go back together and I have safely stored the little shims / spacers that go between the flex plate and torque converter / fluid drive.

 

In fact, I put them in such a safe place, I can no longer find them !

 

Does anyone know exactly what these little shims are called and where I can locate a set to purchase ?

 

Thanks in advance for any help

 

Mike

Denison, Tx