Originally Posted by Trex
M4-78 is being restored by another group called team Bantha. it was an entire planet populated by droids that was cut from KOTOR2 and was where you would go to find master Vash (you only found a letter she wrote on korriban which led you there).
Right now however, there are some concerns over whether or not the project will be completed. At the very least i believe they are waiting for Team Gizka'a restoration project to finish in order to full sort out what they need to do.
Haven't heard that Team Bantha is not going to complete their project, but it is true that they've said from the very beginning that the project must be compatible with TSLRP or there would be little point in doing it. Sadly, though, the project's site is currently down and has been for some time.