You could do a new sculpt based off the art in TRO: SW, but I don't think it is a particularly good example of the 'mech. A new parts sprue as Beachhead mentioned with the hexagonal SRM-6 launcher, arm lasers, and left arm PPC would work.
EDIT: funnily enough, the original stats don't have lasers in the arm.
I suppose a version of the 'mech that can do the 3E, 3S, and 5S variants would be interesting. But that would be a lot of parts.