WAS & SYW 15mm options for minor armies

A few days back I posted the following question on TMP, but the answers I received were unusually inconclusive... so I am re-posting here, hoping to find some additional insights.

I am tempted to expand my WAS/SYW collection, now being built around Prussian, Austrian, and French forces. In particular, I'd like to add some selected regiments from minor countries; I am looking in particular to Saxony, Bavaria, and the Reichsarmee. Since I am working with 15mm, as a matter of fact it all boils down to the style of the coat.

In the case of the Reichsarmee, the excellent article in the Seven Years war Kronoskaf site helps a lot, stating very clearly which contingent wore a Austrian-like type of coat, and which ones followed the Prussian style.

But what about Bavarians and Saxons? I found reference for the Bavarians pointing both to French and Austrian styles; as for the Saxons, I have been looking to plates for quite some time, and I have not been able to decide which way I should head to.

Unfortunately, available 15mm miniatures cover well only the major players: British, Prussians, Austrians, French, Russians; all the 15mm ranges I know of remain somewhat wanting for the smaller contingents. Which leaves me with the doubt about what would be good "stand-in" for Saxony and Bavaria? Could any expert in the field help?

As always, thanks in advance for sharing your insight!