BikeFit offers their VV1 cleat kit, which has the equivalent of 1 wedge built into it:
VV1 Cleat Kit for Mountain Bike

They also offer in the shoe forefoot and heel wedges that you could use to build it up a bit more:
BikeFit - In the Shoe

The in-the-shoe wedges can make a huge difference, although they seem to have some "feel" issues to them - some folks are good with only a forefoot wedge, others don't like it without the heel wedge. If you are willing to come all the way down to Noblesville, I could hook you up - I am a fitter.