AFAIK you couldn't just buy an Esc WRC as a road...and if any had been bought by privateer teams I think they'd have been bought only as rally cars...

The Esc WRC and late Grp'A' car are so far removed from the Esc Cos, as is the Focus WRC from an everyday focus a road version would be impratical both in terms of cost and drivability...

The are in reality a selection of highly developed parts grafted in to the esc/focus bodyshell...

In fact a lot of all WRC share common parts all with the relevant builders slant, xtrac diffs, mountune engines, ohlins/reiger/dyamics dampers for example can be found on numerous WRC cars....