Sarge.

This seems close

Any thoughts on the length of the baton? Best I can judge is about 35 cm (14 in). I want to do some mockups, but I'm unsure of the length.

I just found this here https://www.starwars...ld-out-blaster. Shows that the jacket arms are not ribbed the full sleeve.

I am not sure if this is a stupid question but is the ribbed areas around the sides under the armor fabric or hard armor? In some of the pictures, it looks like it may have some flex to it and may not be as rigid. More like a cummerbund.