or buy, for example, a battlemaster main hand weapon and immediately upgrade it to war hero.
If you do this as a dual-wielding advanced class (Sent, Mara, Slinger, Merc), you can rip the guts of the BM mainhand and immediately put it into a custom (augmented, of course!) orange shell. Voila, a BM offhand to go with your WH mainhand!
If you aren't in one of these ACs, you should of course still rip the mod and enhancement bits for use elsewhere... esp. since they're full Rakata stats *plus* 25 expertise.