I'm eagerly awaiting a 1/72 or 1/76-scale kit of this vehicle.
I've come across a couple of white-metal versions, but these appear to be more suited to wargaming, rather 'chunky' and poorly detailed for my liking. I seem to recall that Kingfisher Miniatures had a decent kit in their list, but contacting the company is proving to be impossible. Does anyone have contact with Alistair Logan (at Kingfisher)?
You might try contacting Dave Allen (who I'm pretty sure does a lot of work with Alastair) through IPMS Mid Sussex - there'll be contacted details somewhere on the www or possibly through IPMS (UK).
Dave is a very competent and prolific modeller in the small scale scene and also very helpful.