Stu, attached should be a pdf of an A1 sheet with minor grid lines at 100mm intervals at a scale of 1:10.... this should fit a cherub rig. Find someone with a plotter or alternatively print it out at any size you choose and draw to the scale of your liking.
p.s. I did have a CAD drawing of Strawberry once upon a time, I shall have a dig for it.
Gavin