NAC is the only school that can offer the groundschool and the CPL flight training, as they are the only school in the USA with a Groundschool approval as well as the flight training approval ( there are others such as EFT /OFT with CPL flight training approval only)
Needless to say these other schools can offer you a correspondence course via BGS and others , you can undertake the exams in Florida for the conversion it will just cost you some $$ to use the exam center thats all.