I've never seen the Eureka landy. You sure it wasn't one of Uncle Les' creations, he occasionally flogs his stuff at the shop. They did make the crew for Company B's G Wagen.
SAS? If you don't like TAG then you could do some minor conversion work to the Eureka Marine Recon. I've backdated a few to 1980s era SF and converted the grenadier to an 80s era SAS trooper. Maybe mix and match with Gripping Beast's Mofo range.
Iraqis? With suitable head swaps, some of the Eureka ZANLA figures make very useful generic OPFOR. Go for the ones with boots and chest rigs. Alternatively, there are always the Eureka/ Kriegspiel Musorians in Soviet helmets. They are hardly my favourite sculpts and yes they they are shorter but based on a slotta base, the size difference isn't really that noticeable and they are very useful proxies for all sorts of things. I use mine as Egyptians and generic African troops.