used 383 main thrust bearing

Looking for a used thrust bearing from a 383. Worn out is OK, but needs to be in good shape. I need it to test a theory about possibly defective Clevite bearings.

I'm assembling a 383 for a friend and two sets of Clevite main bearings have had the same problem of the upper shell of the thrust bearing (#3) are loose in the bore. block has been line-honed and measures good. Lower shell is fine.

If you happen to have an old one laying around, let me know what you would want for it.

Thanks!
Did you put the lower in the block to check it as well? I'd lay my money on that being the block.......