I understand these cables are hard to come by. If you want to avoid buying directly from Alesis, you may want to find a local dealer that carries Hosa cable. The product number is DBK-110. It's a cable with a Din8 and DB9 interface. I got mine at the local GC awhile back. They don't often have these cables in stock which only adds to a lot of customers' frustration. I think either Yamaha or Korg uses the same cable so they should not be ultra rare.