Since this is for a costume, and accuracy of the emblem on the front piece is important, we add artwork in front same as in comic.
As far as the rest goes:
Color: Black w/ silver buttons, No epaulets
Only five silver buttons visible across the top (other buttons/snaps hidden under front piece)
"Lobster claw" emblem in medium-light blue (Royal blue) centered on front piece
Lobster Johnson Jacket made in soft & real cow hide. You can order this Lobster Johnson jacket in any standard size of custom made.