Till armpcm give you the required info, I give you some basic what I know about them
Yes, you are right, the orion set seems too modern
Zahal tank crewmen wore several type of headgear: baret, "kepi-like" headgear, and most importantly converted/upgraded WW 2 US tank crew crash helmet added radio equipment, almost all the time /w protective glasses,
color of the uniform was khaki, or yellow green, in the hot summer of '67 they fought in rolled up shirtsleeves in the tanks
So.. all you have to do is to find US tank crewman wearing the emblematic crash helmet, but don't wear the also emblematic tanker jacket eto, and make some conversion for the radio equipment ),
and/or
find a baret wearing tank commander(in shirt), and equip/sculpt the protective glassboth solution seems easy as kiss a hand...
well I am jokin'
sorry but I can't help figure ideas, maybe 8th army tank crew??
if there is any kind of that..