Do a fleabay search, there's guys in japan selling 4x5" rvp50, in the new packaging and dated 2015 or something.
...
for >$150 a box of 10.
Sigh.
Although, I googled a german shop that claims to be selling the new stuff for 30 a box, but doesn't look like they ship intercontinental. Maybe if I send some to my sis in London or family in NL then my mum can bring it home in her luggage when she visits in a month...?