The one thing that some of the other jackets have that better ones don't is that "Western" yoke. The shoulders have the curve-tapered design that is not really appropriate.

There are Pierre Cardin short tux jackets that have a plain yoke. Here's one with the black buttons replaced with Celtic Knot buttons.

Jacket Picture

Being more Irish than Scottish, I chose the round Celttic Knot buttons rather than the diamond Scottish ones. The lapel REALLY works will with a nice black sporran and kilt belt too.