Any airport that jets fly to will work. Go to another one. Sounds like that FBO is a total a*s. Also have you tried googling Kero to purchase at a c-store?

Here is at least three vendors in the Orlando area that sell Kero:

[link=http://maps.google.com/maps?hl=en&source=hp&rlz=1W1GPEA_en&um=1&ie=UTF-8&q=kerosene+in+orlando&fb=1&gl=us&hq=kerosene&hne ar=orlando&view=text&ei=XF5WS-nFMceztge_4I2vBA&sa=X&oi=local_group&ct=more-results&resnum=1&ved=0CBUQtQMwAA]Kero in Orlando GOOGLE IT![/link]