Came across these generic 10mm casualty markers from Battlescale. They are a one piece resin casting sold in packs of 10 and are very easy to paint up. I have done this pack as ACW Union markers for Black Powder. I have posted them prior to adding static grass so that you can see the textured base clearly. I also include an Epic base for comparison.

Good idea

They work well and are nicer than dice (which I use!)

These are handy, I've just painted up some of Pendraken's WWI casualty markers, and then had to put them on 20mm MDF bases and texture them. So having markers already on a small circular base with texture would be no bad thing.

Perhaps something Leon could look at for the Pendraken ones - I know they have done this with some other markers (cannon balls IIRC)

So far I've painted and based about half a packet of Pendraken AWI generic casualty figures, mounting these on both 20mm and 15mm round bases which I have both textured and 'landscaped' with sand and static grass. I've yet to use them in a game (hopefully in a future contest of Rebels & patriots with our own Steve Holmes - hint, hint) as Disorder markers but they don't have the numerical values you've included in yours so each base only has a value of 'one.'

To cover casualties of variable values/multiples, I've been using both dead and standing horses which I have mounted on bases that include a dice frame (available from Minibits), the die being used to denote the number of casualties.  I used a horse because in it's own way, it is 'generic' in that almost every horse & musket unit would have had at least one if not more mounted officers - so a dead or riderless horse would not be too much out of place in a hot action (nor is anyone going to pay to much attention to the colour of the horse furniture). If I was doing it again, mind you, I would solely use standing horses (denoting some hapless officer knocked off his mount) as they are easier to grab hold of than the prone figure of a deceased parrot horse.   

That's an interesting idea and a good way of using up extra horseholer horses if you find you have more than enough.

Truth be told, Andy, I didn't. I nicked them from my existing '4 horse' horse holder bases and made new '2 horse' horse holder bases (after all, it's only a marker).     

(and, if doing it again, I may simply copy an idea I once saw which used the mounted command stand as the horse-holder marker, especially after reading somewhere that in some army, the horse holders often remained mounted - would still buy the 'empty' standing horse figures of course for casualty or status markers)