Based on the mounted Colonel from the Victrix Miniatures Austrian Infantry boxed set, I've used the covered bicorne head from the same company's french infantry box and applied a suitable paint job.
He may not be bang on the money, but for the few pence he cost near enough I hope. The slightly allegorical theme to the base is a bit of a departure from the norm, forced upon me by by being unable to separate the horses base from the rectangle of plastic card I used to hold him whilst painting. So in order to tie in the resulting plinth effect to the rest of the base I've added a few fallen stones and some fresh greenery. I may yet add a stand of arms and a captured standard to enhance the effect.
The only real downer to the whole thing is the horse; the body and head are fine, but that neck is way too long.