unfortunatly a bunch us of donated our spare shims to a member who said they"lost" the shims in a moment of stupidity. as it doesnt seem they are any extras out there and hpautowerks says they dont have any your best best is to go to a 4x4 shop and see if they will let you search thru their differential spacer bin. i was able to find the thickness needed but finding the inner diameter is a bit of a battle.

you might try calling hpautowerks and see if brandon still works there(dont think so) maybe they can give you a contact # and you can call him and see were he had the shims made or the specs for them. he is in cali anyway.
do you have any shims at all? dont worry about the specs. get the pulley as close as possible without touching the clutch.