Steve,
I guess, you know Bernd Barbas' book (which contains most of the available details regarding these Messers).
Regarding the Hungarians: don't forget, that the 101. 'Puma' unit was a Fighter Regiment (Jagdgeschwader). In April, 1945 the three Groups were contracted, bu none of them were officially disbanded.
I guess, all of the other Hungarian Messers were destroyed (except for the few ones, who were flew to Neubiberg by the II./JG 52's pilots). In Raffelding, some were destroyed by the strafing Mustangs in the second half of April, the others were destroyed by the ground crew in early May.
This Messer (WNr. 611943) in your country:
http://www.ipmsstockholm.org/magazin...0_fuselage.htm
is the only remained Hungarian Messer (it was flew by the II./JG 52's pilots to Neubiberg, but earlier it was Hungarian, the 101/III. vadászosztály (Gruppe) got the plane on 23. April, 1945.
Regards,