OK, got it. I think if I was going generic 1799 rather than refights I'd be attracted to do the forces of the various short-lived Swiss and Italian republics: Helvetic, Cisalpine, Parthenopean, Ligurian ... and exotica like Venice's Albanian troops or Piedmontese brigands etc.
Anyway, best of luck with finding the info you need, building your armies, creating your rules and having some enjoyable games!