Do you already posess an FAA cert? Are you trying to do single or multi or both?
Jack Brown's does a really nice package for pilots already Land rated in "Winter Haven" :
http://www.gate.net/~seaplane/ I don't know if they are alowed to offer training to foreigners (14 CFR 141).
Call and ask, I never went, but I heard nothing but great things and fun stories from their customers.