Here are 4 batteries of Prussian Foot Artillery I just finished. Those are Hat Industries models - one of their older kits, not particularly inspiring sculpts, but they look good with a proper paint job and a nice basing, I think.
The observant eyes will notice that I gave them distinct sholder strap colors, so to distinguish them by their Brigade (white for the 1st Artillery Brigade, scarlet for the 2nd, yellow for the 3rd), thus making them pre-1814 regulation.
Now the challenge will be coming up with horse artillery for the prussians, as there are not options in 1/72 I know of. I might have to do some converting on aditional kits of those foot artillery models.