Originally Posted by
dirtdobber
It's good that you have at least 5 good axles. On the 6th, is the wobble because the axle is bent, or is it because the wheel flange is bent or mounted crooked? The fact that its just a bit shorter won't hurt anything (it may be a problem with tracks, I don't know).
As far as the sprocket bolt holes, I repair my own using some 1/4 inch flat bar. I drill a 3/8 hole and then cut it to size. Mount the sprocket tube on the axle, add the bolt and pieces of flat bar, and weld the pieces of flat bar to the sprocket tube. Mounting it keeps everything aligned, unless your axles are also egg shaped. Use your best axle.
As for a drum, I saw a pair for sale at 6x6talk website.