steel rods for DaVinci

Hello,

I have a 1.0a that has almost been completely replaced.  Thinking about replacing at least the X rods with the steel hardened cousins, so I can setup a dual extruder with real bearings.

Does anyone have the length/width dimensions for X/Y rod replacements?  I believe they are 8mm and around 380 (for the X)?  Having a hard time finding the measurements and where to custom order these things.  Ultimately if I can verify the length i might mount them differently.  It appears finding snap ring groves and M3 threads is the toughest parts. 

Thanks,
Jim