I ordered a pair from AliExpress using the link that Sean provided, they arrived after around ten days.
I see now that I require adapters (2006 model) but I'm puzzled as I think that would cause me further problems? The new ones are "thicker" than the originals, which have obvious signs of "rubbing" on them, from where they contact the interior trims in that area of the engine bay. I have the same items as Johnmed has posted a pic of, so I'm assuming the link got me ordering the correct replacements/upgrades, it just doesn't look like they'll fit, even with adapters??
It's never straight forward...
__________________
Audi D3 S8 - 2007 - V10. B&O, Phantom Black, black and silver interior, and still completely standard with everything working as it should
Audi TT - 2015 - Ultra