Been out on R1 for years. Theres also a R3 (korean)release thats a straight clone (with all the extras) of the R1 - Thats what i've got cost me £3.
Theres a double disc set due soon or already out on R1 that includes the cheapy Sequel.
i may be wrong but he may be reffering to the french film cache(hidden) not the 80's scifi horror which i have on region 1 , didn't realise there was a sequal though
haven't a clue mate, had a bit of a look but couldn't see any other than the play one you mentioned, i'm sure there will be a french release before may ......