I think the OP was asking WHO could help him in TV. I have never had this type of work done in TV as I try to DIY, so I do not know the answer who to recommend. Someone should be able to put in a new motor for < $500 for you. Selecting the right motor depends on your cart.
To set expectations my cart has a 'high speed' (24ish mph) motor (came with cart) and 500 amp controller and it still slows to 18ish up the steepest hill on Odell in Mallory.
If you did want to try yourself or could find someone to just drop in a new motor at your home, I have seen folks have great success replacing the stock motor with a motor from Plumquick. You may find a motor with more power and torque is close enough and the only change you need.
The Bandit - Plum Quick Motors
Ps. I already know that 24mph is illegal for a non street legal cart, but I cannot afford to change the motor for a slower one, so I has to take my chances
