Your local auto body/paint supply store should have sand paper up to 3000 grit.
If you don't know of such a store in your area just go to one of the local body shops and ask them where they get their paper from.
3M Scotch Brite Nylon Pads:
7445 - White pad, called Light Duty Cleansing - (1000) 1200-1500 grit
7448 - Light Grey, called Ultra Fine Hand - (600-800) 800 grit.
6448 - Green (?), called Light Duty Hand Pad - (600) 600 grit
7447 - Maroon pad, called General Purpose Hand - (320-400) 320 grit
6444 - Brown pad, called Extra Duty Hand - (280-320) 240 grit
7446 - Dark Grey pad, called Blending Pad (180-220) 150 grit
7440 - Tan pad, called Heavy Duty Hand Pad - (120-150) 60(?)
Green Scotch Brite is available EVERYWHERE. It's 600 grit.
Blue Scotch-Brite is considered to be about 1000 grit.
(The value inside the parentheses is directly from 3M.)
--------------------
STORM TRACK
formerly : Stormin1
If you get caught in the Storm Track beware it could be a Typhoon or Monsoon with Rolling Thunder and Lightning Flashes that when Unleashed may send splintered Wood flying everywhere.Storm Track's Web Page