Nintendo GameCube SCART cable quality off

[BitFaced]

I've been over this before but the quality of the GameCube SCART cable I have seems to be off, as there's a lot of video quality rubbish in it for some reason. There seems to be video problems like diagonal moving lines:

So I'm wondering if getting a sync stripper for the SCART cable would help in any way, specifically the one listed below:
http://www.mmmonkey.co.uk/composite-syn ... er-lm1881/

So can I make the SCART cable look better with a sync stripper, or will it not help and then I'll have to get a new one?

[theclaw]

Is it a PAL SNES cable? Those don't work quite right for Gamecube.

[BitFaced]

Is it a PAL SNES cable? Those don't work quite right for Gamecube.

Certainly wasn't SOLD as a SNES cable, but a GameCube cable. But maybe the eBay seller was lying to me (like what happened with the PS1 cable I got that could of been composite instead of RGB...)

[BitFaced]

Does anybody know where I can find a proper RGB PAL GameCube SCART cable?