But I can't find the original thread...
These were taken at Elvington Bomber Museum, York, UK this weekend (Click on photo for Photobucket gallery)
Off the top of my head there was an old Airfix Guide on Modelling RAF vehicles, which had reasonable drawings of the QM trailer.
Airfix Magazine Guide 27 Modelling RAF Vehicles by Gerald Scarborough (Author)
8 examples listed on Amazon:
http://www.amazon.co.uk/Airfix-Magazine-Guide-Modelling-Vehicles/dp/0850592615/ref=sr_1_2?ie=UTF8&s=books&qid=1216135409&sr=1-2
The Airfix kit has just been re-released Airfield Recovery Set (A03305)
http://www.airfix.com/airfix-products/classic-kits/dioramas-and-figures/a03305-airfield-recovery-set-a03305/
Accurate Armour have been inspired by the Airfix Airfield sets in 1/48, but not 1/35
http://www.accurate-armour.com/showaaproducts.cfm?category=82&subcategory=251
Tonda did a 1/35th vac-form of an OX(?) truck & water carrier which will do as a start for the tractor unit, sometimes shows up on €b@y...
enjoy
