The bar is from Powerful 4x4, but Roo Systems sell the same bar. Just that Powerful had them on special on Saturday.

http://store.powerful4x4.com.au/prem...lux-2005-2011/

A car trailer with a car on is too heavy for a Bobcat, as will be the box with 750kg of stuff in it. The bucket and front ram is only rated for about 400kg, if you overload them they can crack.