Obi-Wan said:

The site I have been pointed to contains 5 links for DVD, 2 of those are PAL. Both PAL-links have the same link to a single-layer-DVD, called PAL_SL_DVD despite the fact that one should be PAL_DL_DVD for double layer.

Assume the site you are talking about is fanedit.info (it's OK, you can mention it) then check their FAQ:

what do I do if a link is not working or somethign (sic) else is wrong?
write a REPORT about it .

Out of interest, why are you so eager to get the PAL version? The NTSC disc has the same content and should work on the majority of PAL players.