Why does it have to be PAL? If you're thinking that a UK TV release from the 80s will automatically be superior to an NTSC DVD purely by virtue of being PAL, that simply isn't the case (particularly considering that any extant recording will be analogue VHS, thus falling significantly short of the 720x576 digital standard).
The 'best possible edition' would be the US Blu-ray release. If your PAL preference is because you're limited in terms of playback equipment (and can't play NTSC, let alone Blu-ray) you could - hypothetically - downscale an HD rip to PAL DVD.
In any event you can do much better than an old VHS recording of a fairly common film...