Italeri do a 1/48 Cessna 172. Minicraft do a range of Beechcraft and other Cessna types, including floatplanes. Hobbycraft do a rather nice 1/48 DHC-2 Beaver, a classic bush plane.
There's also OTP who do a printed Cessna and a Lear, much cheaper than kits. You can even buy them as a bundle with a control tower.