That looks promising mate
I`ll be watching how this comes along
One thing about our guys in the SAS in the desert during WWII was they wore Arab headwear,Berets,Officers would wear officer peak caps,commando hats (Both officer Peaked Caps & Commando hats can be found in the Original Action Force line SAS & Z force figures had the commando hat,Officer Peaked cap would be The Black Major or Action Force Officer).
Maybe also a DAK field cap,as it was used to fool German Aircrafts sometimes by one wearing it & waving to the aircraft. Bet you didn`t know that did you
As for body,rolled sleeves or long sleeves,SAS wings on the torso (back then). Body parts Shorts & trousers,socks & boots.
maybe also a Great coat or local robes??? As it`s bloody cold in the desert at night.Maybe the German Great coat?
Well there`s a few suggestions mate
As for vehicles,the SAS like the LRDG used a chevy based truck to partner up with the jeeps. Though like anything in the Military & War time,whatever they can steal,beg & borrow too

The US were there in the desert towards the backend of that campaign so yes a dodge command car is possible i suppose though from a practicle point it`s the best for behind the lines ops. It`s not suitable for stock or cargo.
Maybe the WC 51 though. Though most certainly a Chevy truck. Also captured German stuff too
Weapons,Lewis guns,Vickers guns, Thompsons (Drum mags & stick mags),Stens,SMLE .303 rifle,Bren,M2 .50cal,.30 cal & captured German weapons too.
Hope any of this helps mate
ja
Steel Bonnet