I know have Billet water pump spacers for BBC in the same sizes and they come with gaskets and 4 grade 8 bolts also
Here is my ebay ad (check my other ads as well)
Above Added: Fri July 13, 2012, 9:29 pm EST
Forgot to add that all spacers are sold with new grade 8 bolts and 60# gaskets (4). The 1/8" spacers are sold with gaskets but without bolts.
Above Added: Sun April 8, 2012, 8:34 pm EST
Manufactured on a 3 axis mill in the USA out of 6061 T-6 Billet Aluminum.Perfect to aid in clearance of crank triggers, belt drives, front drive distributors.