Yes! have the same dilemma currently on a TAC20 (6300PA3). TK still makes the boards but there is a world-wide chip storage, so any boards they do have they are not selling to outsiders. you can try to get board repaired but the success rate is only 50-60%. i think the LD-16 drive kit upgrade is the way to go here depending on controller. at least you can buy parts from Wittur or Kone..