Where the pressure plate bolts too the pedestal .
They are round thin and narrow with the holes for bolts .
I beleive they come in .005 and .010 thickness .
Your going to need to order some .
Making them would be tedious but possible .
Brass and aluminum are what ive seen .
Any chance you have another floater ? Different thickness ?
Any shop or supplier even a well stocked race team should have them. .