The P-38 is owned by Red Bull and is the famous aircraft displayed and raced by Lefty Gardner for many years - beautifully rebuilt by Ezell Aviation after a fire and forced landing a few years ago. It's based in Austria. There's also a P-38 under rebuild in the UK, it arrived from Australia a couple of years back.
The nearest things to a real Stuka that have flown were the "Proctukas" built by Viv Belllamy for the Battle of Britain film in 1968, based around a couple of well-worn Proctors. Apparently they flew horribly and were abandoned, the film unit sticking to rc models instead.
Pity your brother didn't get a pic Angels, love to know what he saw!