I'm going to be supercharging my car and need a taller gear than the 4:10 I have now. Rather than changing the gears in mine, I want to buy another rear. That way I'll have a spare if I ever want to change my combo again.

Must be clean. Don't want one that's real rusty. Can have stock gears, or if you have one recently built, I'm looking for one with 3:55 gears.