Have a look at these;

http://i156.photobucket.com/albums/t6/pureteenlard/track1.jpg

http://i156.photobucket.com/albums/t6/pureteenlard/track2.jpg

New tracks and sprockets - cost me an arm and a leg but well worth it. Weigh bugger all and tough as old boots.

Shouldn't be long now until I get her up and running.