Where would I get a Napoleonic Prussian uniform?

[Duuring]

If you know your business with the needle and tread (And once again, I surely don't), the Prussian uniform with it simple cut can be made as much authentically by you as by any other. Especially considering you want to do an officer, which had their uniforms custom-made to fit them perfectly.

Still, I'd really get into some research about WHAT you want to re-enact EXACTLY before you make any decisions. That means regiment, battallion, maybe even company, year, campaign, etc.