Right Tim, Italeri sets are more expensive.
Classic Toy Soldier's Mexican Artillery isn't bad or that expensive, and has uses for possibly French or Spanish Napoleonic.
I've called AIP's Royal Artillery, "US 1812" by swapping the British gun with a French gun. I've also used the Guard Artillery, with Shako Heads as French pre-Waterloo artillery.
I hope there wasn't a misunderstanding as in cheap = bad. AIP's artillerymen look good in profile. Perhaps turning a few heads will give them a 3-D look.