The stern of that kayak is going to make it somewhat challenging to mount a motor, not impossible but you'll have to reinforce it somehow, depending on the motor choice. I wouldn't sell it and get a kayak made for a motor though becuase if you have to paddle a kayak that is made for a motor, you will regret it. I mcuh prefer a good paddling kayak that I can add a motor instead, especially if you do any motor up and float back river type trips.
I will second the starboard recommendation above as well. I was looking for a nose mounting pl;ate for my ATAK120 and nobody had them in stock so i bought some 1/2" starboard and made my own and it worked out just fine.
I have also seen guys use tracks mounted across the rear of a kayak to mount torqeedo style motors as well.