I created them using the Tech. Manual and two photos from the Verlinden MLRS book as reference. Due to this scarcity of reference, I'm not sure how accurate they are, so if anyone has seen one in the flesh or knows where to get more references, please comment.
When I eventually finish the CAD model, i'll scratchbuild the HEMAT to go with my HEMTT.
Sorry about the quality, but I haven't found a way to save good jpegs directly from drawing views.
Isometric view

Rear view

Side view

Top view

Cheers
Ed