C6 Z06 caliper pins too long?

[Takid455]

Seems to be an issue with C6 Z06 caliper pins touching the rotor. Not all setup but some. Grinding down the end of the pin will remove the flange that holds the sleeve in place. Seems some have made spacers to go under the pin threads to provide more clearance. Anyone know if these are readily avail or need to be made at a machine shop. Perhaps a different set of pins? Not all of the pins touch. Just a few on the RH inside under lateral loads.

Current pin sets in use are :

Front Caliper Guide Pin Set ACDelco 18K2069

Rear Caliper Guide Pin Set ACDelco 18K2070 These are non broached 6mm allen type Calipers are AcDelco C6 Z06/ Grand Sport (silver) Purchased new 12/28/13