Hay Good morning "M" welcome to the forum..
Why don’t you just use your Traxxas ones??. I've got them on both of my GorillaMaxx builds and they are holding up great so far..
http://www.rc-monster.com/forum/showthread.php?t=11972
Yes I know, your stock e-Maxx front drive shafts is too short.. Just buy & install a rear one there in it's place.. Your total drive live assembly is now $15.00 and better yet it's off the shelf..
If your using 1/8 hybrid diffs then just buy this part for the pinions and still use your Traxxas drive lines..
http://www.rc-monster.com/proddetail...coupler&cat=44
Just a thought..
Hope that helps
Have a great one..
Shaun.
P.S.
Post some pics when you have the opportunity.. (thanks)…