I was able to figure how to make an custom length extension. I was able to find a coupler that will fit both inside the drain hose and inside a reinforced braided rubber hose. I also got a new adapter for the sink drain that will fit inside the rubber hose.
I also found out that the dishwasher drain has a check valve in it. So water will not backfill into the unit itself. I am going to try to run the line in the back of the cabinet. I got a piece of crown molding to cover the line once I am done.