that's not really that high... some chain parts stores might carry it, but i like to buy quality sandpaper. or, you can get it from a paint supply house or even.. http://www.autobodytoolmart.com/
I got mine at a automotive paint store....but the link he provided has good paper... I live in Dodgeville, WI...about 45 minutes west of Madison.
Overall Car Shots some up close flame shots painted cowl vent cover Painted Bullitt Aluminum gas door with polished screws painted mirrors