I've been getting along fine with my Switchback but it is toooo short in DL for me. I got it for a good price about 2 years ago. I can feel the torque in my hand when I'm practicing because I'm over-extending myself and the bow. I know my form is suffering from the short DL too.
I have no idea (on if yours can be retrofitted with a cam of your specific DL)....but a new cam is about $90.