I checked Amazon.com, which says that the US and "import" versions are "currently unavailable." Often, when a book or film are out-of-print, Amazon will provide a link to vendors of used copies. But there are no such listings for "Jacknife." My only recommendation is to try e-Bay or collector sites.
Are US- and UK-issued DVDs compatible?

Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.