There's a UK company making carbon stuff for the DF03 already,they've been racing it,towers and some suspension tweeks so far but there talking of a chassis too.Saw it on ebay,search ' tamiya dark impact' on ebay.co.uk.It basically needs cvds some better shocks and for tamiya to release the slipper,then i could see it being competative for very little money.
You'd be waiting a year atleast for a TRF version i would have thought,maybe forever,i'd just get one,very cheap from japan on ebay,and make a few changes as they become available.
Here's a link to those towers;
http://cgi.ebay.co.uk/Tamiya-Dark-Im...QQcmdZViewItem