Here are 2 regiments pained up from the Wargames factory spanish succession range. They are quite good figures, if time consuming to build. I made up 2 regiments 1 british 1 french.
I would reccomend them for a quich way to get your 28mm armies larger and as they also have cavalry out soon then you should look into them. You can make all sorts out of the figues with heads for the Gloriouse revolution to other periods too. with options for grenadiers (with grenades) and officers.