Generally for this period there was little difference between uniforms in different armies. So you can use nearly any figures for nearly any army.
For the Savoyard army the mounted troops are all standard types with tricornes and no visible breastplate. The ordinary infantry are standard types in tricornes. The grenadiers wear a bearskin with a bag hanging down the side. The grenadier hat is basically the type worn by the Austrian/Imperialist grenadiers.
I can't help you with manufacturers as I don't fight skirmishes in 28mm. But I would guess most ranges will have suitable figures.