If you look up the Bigfoot specs for 2007, it doesn't list the BB. For 2008, it lists a Howitzer Spline BB (by Truvative).

The User Guide is here. Does this look like your spindle?

I agree with SkyDog: It may be cheaper to replace the BB with a commonly used geometry, and a crankset to boot. You'd want to be sure that you get the dimensions of the BB and the threads or other interface accurately to do this.