From the comment area:
There is a Hungarian movie (Seven Small Coincidences / Hét Kis Véletlen)
which is known to have nude lesbian scenes, becasue the reviews mention it, you can see a second of covered nudity in the trailer here:This movie was a box office failure, so it disappeared from the cinemas quickly (it was played by art cinemas anyway, because it’s not a blockuster), it played at some festivals, and since then I can’t find it.
Maybe you have some connections who can find the scenes.
Scoop’s note: I haven’t started digging yet, and I’m a bit stressed for time. Anybody else have some help? (I’ll do some scouting around a little later.)