4x4mm steel u-joint

[DrKnow65]

Hey guys, need a little help locating a steel ujoint that I can use to create a custom front driveshaft for my current hyper7 conversion.

I'm relocating the CD farther back on the chassis and want to section togeather a pair of 4mm (shaft) driveshafts with a ujoint and carrier bearing, but can't for the life of me locate a 4x4mm steel ujoint (or cvd if it exists).

Any body have any ideas? For reference the traxxas Villian XL uses a plastic version of what I'm looking for... http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXGBH2