The first thing I'd probably try is to call up musical instrument stores in your area that stock Kurzweil and must have access to an authorized service center that they use to handle warranty issues.

Otherwise try the listing of techs by state at http://www.mitatechs.com/zip.html as there is one listed in Orlando.
http://www.eprelectronics.com/ handle Kurzweil but are in Tampa not Orlando.