Andréas,You have good taste in aircraft, I too am a Mustang buff. I have 12 in 1/48 scale from the P-51A to the F-82 G and everything in between. There is a company called MODELCRAFT that has 3 different versions of the F-82, the "B","E", and "G" in 1/48 scale. They are still available at Squadron.com. The kits need lots of dry fitting and filling due to poor fit of parts, however with lots of patience they make a nice looking model. Also Monogram has re-released a 1/72nd scale F-82 kit several times over the years. It is an old mold from I beleive around 1966 or so, but is easy to build and looks good when finished.
Happy Mustang collecting!
John L.