Hi Henrik,
There was a line drawing General Arrangement in "Cane Trains" about the sugar Industry in Fiji. This book also had line drawings of a lot of the other equipment that operated in Fiji. There may be line drawings or photos of similar units in LR66 (australina Sugar) and LR77 (Fiji Sugar).

The ILRMS has a similar unit "Seymour".

http://www.ilrms.com.au/seymour.htm

and in action
http://www.youtube.com/watch?v=fT6-2EZaqBo

I have taken a lot of detail photos of "Seymour" for a planned 7mm scale model. I would be happy to put these up in an album for you if you wish.
Regards
John Garaty
Unanderra