Hello Dans,
Great Topic! Although having been a reader of this forum for just a few weeks, I was already under the impression that I was the only modeller not interested in Jet Fighters and WW-II aircraft.
Esci/ Ertl did a beautiful (and not expensive) 1:48 172 as a floatpane as well as with wheels.
Heller has a 1:50 (these darn Heller Scales) Cessna 337 (you know: the one with the pull and the push-props), military though in a white mold; easy to turn into a civilian plane.
In addition to djmodels1999 reply: Airfix re-released the Skyvan (and I keep hoping they will do the same with the Islander, djmodels you lucky #%*&!
)
Academy has (had?) a Cessna 150, Piper Super Cub, Piper PA28 (if I remember correctly) and a Beech Bonanza V-tail, all in 1:48.
Good Luck,
Gertjan