The cost on replacing the timing belt should be around the $350.00 range. I wish I could give you a name for a repair shop because I understand how frustrating it is to find a good repair shop.
My advice is to call several (at least 3) repair shops in tampa and ask for an estimate over the phone for replacing the timing belt. Use the price range I gave you and the price the dealer gave you as a guide , this will help you determine where you should have the repairs done and you will have a good idea if you are getting a fair price.
please let me know what you find out for prices and I will help you any way I can.