Yes, it's an easy fix, all the more so as the other three regiments in Montmorency's brigade all had their drummers in the King's livery. Feel free to drop me a PM if you have any questions about some of the uniforms as I've gathered a fair bit of material on the subject over the years.
Just out of curiosity, is the Bourbon regiment officer waving his sword a conversion of yours or was he supplied as is by Ebor ? (he's obviously a variant on one of the existing officers/standard bearers but I don't see the sword-armed version on the Ebor website).