I belive you are talking about the Stormtrooper Commandos that were in Zahn's Thrawn trilogy, no?
It would be sort of hard to have a real image of them since they were never in the movies.
"Politicians campaign in poetry and govern in prose."
ThRaWn90,RAL_Thrawn,HPGR_Thrawn, Rogue 6
Born And Bred In XWA Country