Construction Industry Kits

CAT (catepiller) makes 1/50 scale diecast ones of almost all construction tractors. If you are looking for WWII then the only things i know of are a bulldozer and a converion kit to turn a Tamiya 2 1/2 truck into a dumptruck.
I know there is a 1/24 or 1/25 dumptruck out there but I dont know who makes it. sorry I cant be of more help.

AMT/Ertl has reissued some old construction kits. I know they do a dump truck/snow plow, dozer and several others.

AMT also has a concrete truck as well. As mentioned before the only heavy equipment is the die cast Cat stuff. I did find a site on Google that offered I believe !/24 scale scrapers and dozers but unfortunatly did not book mark it.

Here are links ot a few site that have some kits, both models and die-cast.

http://www.ccmodels.com/
http://www.oakridgehobbies.com/toybox/toy_caterpillar.html
http://scalemodel.net/scripts/asp/catresult2.aspx?category=Farm/Construction%20Equipments

http://www.ertltoys.com/brand/amt/2003/pm_construction_heavy_equipment.shtml

http://www.ehobbies.com/diecast-special-diecast-1-50-construction-equipment.html
http://www.3000toys.com/catalog/item_list_sql.asp?osql=mfg='ERTL':A:instr(blob,'model_kit')
http://www.venturahobbies.com/trucks-construction.html

Hope this is of some help. - Ed

Sweet, thanks.