I have photographed the only two Junkers Ju-87 Stuka examples known to have survived World War II, the Ju 87 G-2 at the RAF Museum near London and the Ju-87R-2 Tropical version in Chicago.
However, the Flying Heritage & Combat Armor Museum is restoring a rare Junkers Ju 87 R-4 Stuka to flying condition, which I have photographed in Everett. That project includes a set of 37mm Bordkanone for under the wings.
Junkers Ju 87 G-2
RAF Museum 2008