Highly unlikely. Soviets may have had some of their Matildas still
running as late as 1944 (IIRC production was continued until 1943 for
that purpose). Germans captured several after Dunkirk and never threw
anything away, although whether they were still gun tanks or had been
converted to some other use is unclear.
I'm pretty sure I've seen a picture (probably in an Almark(?) pamphlet on
German SPGs of foreign origin) showing a Matilda with a gun (memory says a
French 47mm AT gun but I don't know it the French even had 47mm AT guns)
mounted in a home-made looking square box where the turret should be.
They also stuck 37mm PAKs onto Universal carriers, which look quite cute, if