More Heavy Jin unit variety

I wonder if someone can mod some new units that aren't over the top romance looking. I would love to have a heavy jin sword unit, similar in look to the halberd but with shield and sword instead.
There are unit packs already on steam but most are too over the top, brightly coloured for me. I love the look for the heavy jin halberd and it's archer counterpart but wish there was a decent swordsmen to upgrade from the standard swordsmen.
I'm even curious to try and mod it myself but not sure where to to begin.

Any help or mod would be appreciated it.