Original stuff: E-bay
Otherwise try dl the counter scans, printing them on business card stock, spray glue-ing the heck out of their backs, mount them on good cardboard and using some exacto hobby knife and a metal ruler.
As for the Striker miniatures: I use 6mm scale and their are some nice business sites for Sci-Fi 6mm....6mm allows for a closer scale, and you can fudge Var'gr and Aslan.
Gats'