Well, I figured out a good set of driveshafts. First, I took the stock shafts and JB welded some spare universal ends I had laying around onto them after cutting what was left of the factory ears off. I then let it dry for a few days, but that didn't hold long. They were strong enough to wheelie, and tear around the lawn, but I took it up a dirt hill and it blew the front one a few feet away from the truck when it started bouncing and losing momentum.
Then I went back to the drawing board, and all I could think of to work with was a bag of spare traxxas rustler shafts. I ended up sawing the ears off of a female shaft, and cutting one male shaft short, and then I put them together with the female only engaging a 3/8th inch of spline or so, and viola, extended traxxas shafts. I made two of those and ran two 5000mah packs yesterday without breaking anything. I'm really liking these 2.2's, they find traction where the 1.9's would just spin