I think there is one -29 and one -17 still flying, both with the group formerly known as the Confederate Air Force (who sold out and went PC).

I'm pretty sure one of the P38's is the one that my son's employer and others melted out of the Greenland glacier and rebuilt. It was in a Discovery channel show several years ago. Several p38's and the group leading b17 crash landed out of fuel in bad weather during ww2. Crews rescued, planes abandoned. I saw it at a Peachtree Dekalb airport air show several years ago.

My father flew the -38, and loved it. Except when they used the 150 octane experimental fuel and turned the plugs into fishing sinkers. His were armed with 4 .50's and 2 20mm cannons, all in the nose of the center nacelle, and all were sighted straight ahead, unlike all the other fighters with wing mounted guns that had to be aimed to converge at some fixed point ahead of the plane, which deconverges them at all other ranges.

THe -38 uses turbosuperchargers so the exhaust sound is muted by the impeller blades, like you ran it thru a blender. Markedly different sound from the Merlins in a P51.

THe -38 also runs the compressed intake air thru ducts in the leading edge of the wing as a primitive intercooler, and you get some weird sounds from there...