Can anyone identify this R2 unit for me please?

Hi gang,

I'm selling all my loose modern figures on ebay at the moment but cannot for the life of me remember what this astromech droid is called?! Furthermore i've done abit of research on google, rebelscum photo archives etc and can't find the little blighter anywhere! I can only presume i once pulled him out of a vehicle pack or something similar so anyone out there know who he is? If the photo is unclear he is white like a normal R2 unit but his head is gold, brown trim and an orange eye and orange circle on his top?

Many thanks in advance guys n gals :mrgreen:

R2-C4
http://figureoftheday.blogspot.com/2009/08/figure-of-day-day-1096.html

astromech_droids_action_figure_pack_

Thanks for the effort matey but that droid is a kinda yellow/mustard and this 1 is brown and gold. I've just this minute found out it's actually R4 -G9 ROTS Sneak Preview :mrgreen: hoorah!