I may have a breakthrough. The tracks on the Charioteer are the same as those on my Churchill Crocodile (which is in use for the BBB build). So if I use the sprocket and tracks for my Charioteer, does anyone please have a spare set of sprockets and tracks for the Tamiya Churchill?

Could ask Accurate Armour if they would sell you the sprocket and tracks from their Charioteer conversion.

http://www.accurate-armour.com/ShowProduct.cfm?CFID=4242594&CFTOKEN=12756280&manufacturer=0&category=66&subcategory=40&product=540

More on the AA Charioteer

http://www.militarymodelling.com/features/feature7/index.html

I have thought of that, but as time for the TD campaign is pressing, I am a bit worried about getting them and completing on time. Although I thnk I might order the Track Pack of 15.5" Cromwell tracks and sprocket set.