![[Linked Image]](http://www.mvtur.ru/published/publicdata/GB112/attachments/SC/products_pictures/taifun3_enl.jpg)
I think, something like this can easily fit your requirements. May be this boat is not as fast as H-18, but it is lighter and can carry heavy loads.
http://triton-ltd.ru/ru/products/catamaranssail/tayfunhttp://translate.google.ru/translate?hl=ru&ie=UTF8&prev=_t&sl=ru&tl=en&u=http://triton-ltd.ru/ru/products/catamaranssail/tayfun
But it's other side of the Earth....
