So, I know there's Kallig's Mask and Lightsaber for the Sith Inquisitor - are there equivalents for the other classes? Worried I might have sold something by accident

IIRC all of the end of training weapons are BoL. End of Training weapons include for example the Sith Assassin Doublesaber that Zash gives you. Near as I can remember all of those first planet modular weapons are BoL and being modular can be easily upgraded, or even down graded, as needed for a new toon.

Correct, although there aren't any others (and Zash doesn't give Sorcerers an Assassin-only weapon...) apart from the Kallig ones for Inquisitors. (If a female Smuggler romances Corso, at one point he gives her a Westar blaster, but it's Bind On Pickup. It was also, back in the day, one of only a few weapons usable by player characters that was moddable-green.)