I don't know if it is available in English, but you can take a look at [link=http://www.stahl-modellbau.com]http://www.stahl-modellbau.com[/link] and also [link=http://www.rc-truck.com]http://www.rc-truck.com[/link] for some leads.

I don't know how much you're looking to spend, but these models look pricey. Some have actual miniature hydraulics. Very cool!