I´ve got four indian army officers by Copplestone right here on my workbench...
... which I got from you. Now THAT´S irony! :

:
Seriously, I´d look into either those Copplestones or maybe Artizan Brits in Africa?
Oh, and that´s a lovely little Rollie you´ve got there. One thing, though, you might consider deepening the contrasts on the Vickers MG? It looks a little bland, if very true to the comic... just as a focal point for the car. It´s all very much "tone-in-tone".