Looks fixable to me. Just splice the wires and get out a needle & thread. I've repaired at least three tire warmers with varying issues. Not rocket surgery.
this guy as one: http://forums.13x.com/index.php?threads/moto-d-rear-dual-temp-warmer-brand-new.349863/
Appreciate the heads up, but the plugs are different. For the digital warmers, the front connects to the rear, so I'd specifically need the digital rear because the front doesn't work otherwise.