Grumalu now being distributed in the US! Just saw it on their facebook page. They have some serious heavy duty dozers with lots of customizations to choose from when ordering a model. I personally like their detailed 1:10 Cat DT9 dozer that only weighs 78 kilos!
https://www.facebook.com/Grumalu-USA-1388686111158445/
http://grumalu.com/en/5-construction-machinery-rc