Valkyrie
A winner is you!
The clues explained:
Don't look so disappointed. I still came for you after all.-In Norse legend a Valkyrie is a warrior woman who comes for you on the battlefield if you prove yourself worthy enough. The Battlemech Valkyrie not so much.
With my name you'd think I would keep slightly different company.-The Valkyrie is heavily associated with the Federated Suns.
If some sources are to be believed I should be quite common.-On New Avalon is an automated factory that according to older fluff was churning out an impressive number of Valkyries. The specific number given if I remember right was over a regiment a year.