Spanish Drummers - some dubiety

As far as I can tell, the drummers didn't dress like this

The next unit of my 1809 Spanish army up for painting is the Regimiento de la Reina, whose uniform is well documented, but I have had a bit of a goose chase trying to identify what their drummers wore.

It seems likely that the Spanish line infantry would have worn a mix of uniforms by 1809, with some units still wearing the blue 1802 kit, most wearing the 1805 white coats, and a proportion of makeshift outfits using the ubiquitous local brown cloth, but I'm trying for something very close to the official appearance for Reina. Drummers? - don't ask. A lot of vagueness abounds - a couple of sources state that the drummers wore anything the colonel fancied, which may or may not be true, but doesn't help much. I've recently obtained a French book about the Battle of Ocana, which includes some very nice uniform plates by Peter Bunde, and I've also done some study of the Spanish items in Bunde's catalogue, and it seems that drummers had a standard uniform - dark blue with red facings - regardless of the unit's facing colour.

That's what I'm going for at the moment - artwork here is taken from the Ocana book, featuring Bunde's plates. Any inside info on Spanish drummers will be most welcome - most of the illustrations of painted models on the internet (including catalogue pics from figure manufacturers) show infantry drummers dressed the same as the rest of the regiment - maybe some of them did?