Antilles BioGen

Antilles BioGen (ABG), according to the medical droid 2-1B, was the manufacturer of the L-hand 980, which was used as a prosthesis for Luke Skywalker after he lost his duel with Darth Vader. While the arm which goes with the hand has been discontinued, the 980 is still being produced.

Prosthesis

 * L-hand 980

Behind the scenes
ABG was first mentioned in the Dear 2-1B column of Star Wars Insider 52. It is unknown whether or not ABG is considered the canon manufacturer of Luke's hand, or whether 2-1B was just lying.