Turbine Training Center for Cessna 208 and King Air 90/100/200 Series pilots, operators
Did mine there 7 years ago, was very good. Smaller than most places but had a full motion sim and excellent instructors. It is not a type rating though, more of a type specific course to satisfy insurance and teach you how to operate the 208.
Yes, you need a float rating to fly an amphibious plane
