Outer Limits 4x4 Board

hey all, any one know if there is a sliding rear window avaliable for gu coil cab's, i know ive seen em on hilux's and f-trucks and such but never on a patrol, does any one make these for them?

heres a pic of what im after

Id be interested if someone can give me a part number or supplier around melbourne.

My brother ended up cutting his whole rear wall out to fit a custom sliding window.... Im not quite that keen.

ps - Ive got a late model gq ute.