Rob, most metal and resin manufacturers do one or another set. Trawl the Detail and Accessory section of
http://www.onthewaymodels.com/kitlists/manufacturers.htm
for starters. Wee Friends might be one of many interesting manufacturers. All these are in 1/72.

Mind that there is lots in 1/76 as well. There will be few to tell you your jerrycan, tarp roll, box or crate is a mm short. Weapons, helmets and especially spare wheels and track sections might seem a tad small at times. Check the web for SHQ, Milicast and MMS. Regards, Pa