Elastolin has figures in its line, for the Thirty Years' War, which can pass for English Civil War troops, I think they sell well enough on the Continent, but not sure of real numbers.
Tradition also has some English Civil War figures in its toy soldier catalog, available painted or as kits, I think.
Beyond those, I don't know who else has done any. You might have to go back to the classic toy soldier makers. I seem to recall seeing someone's figures in O'Brien's book, I'll have to look it up.
Prost!
Brad