I recently traded my DM for a tidy JD and started looking around for mods for it (as you do).
I found a company in the UK selling 70mm judge Dredd busts and thought it would be perfect for my machine.
Here's a link to their website- http://www.darkworldcreations.com/judge-dredd-110-scale-bust--limited-edition-59-p.asp
Now I just have to break out my mad painting skills!