Cut Depth of Tool

I am trying to make some jigs for my handibot and need a cut depth of 2" from the bottom of the base plate. Using the bits I have now (basicaly the ones that came with the Handibot) I can only get a cut depth of about 1" when I seat the bit to the recommended depth. I have looked around online and have not been able to find a longer bit that will fit. Has anyone found a longer router bit?

Yes there are longer bits, sorry I am away from my pc for a while but if no one else has chimed in by the time I get back I'll post some sources.
Don't forget that besides a longer tool you can also move the router up and down in its base.