Very nice work indeed, looks the biz. One thing though, if you don't mind me adding - the concrete dispersal bay was made up of 'slabs' normally around 10x12 feet or 12x12 feet, so you need to add the joint lines.
Woljags, Jeep kits are available from Airfix and others in 1/72nd scale, Tamiya and Hasegawa in 1/48th scale, Tamiya and Italeri in 1/35th scale, and Italeri in 1/24th scale. Have a look at Model Hobbies or Hannant's web-sites, and there may be more.