Recently produced by unofficial sources, are 'Worlds Smallest Transformers' sized Tracks (blue) and Road Rage (red).
Takara were originally planning to release Tracks before the WST series was axed, so now some fans have produced one, and offering it in two colour versions.
http://www.tfw2005.com/transformers-...nd-red-166385/

The detailing is amazing... you wouldn't know you were looking at WST-sized figures from those photos.