I noticed it wasn't working yesterday when I needed it. Typing etka online into Google gives some options, nemiga.com being one I have used before, but it isnt as good
I'd bookmarked the pages I'd usually start from and yesterday the links kept throwing up 'bad gateway'. You can still get in from their home page https://7zap.com/en/ hope not, but it's looking like the old catalogue version is gone, just the clunky later one with the part numbers partly obscured. Try LLLparts.co.uk instead, bit better...
Try these guys instead. I used to use 7zap but prefer LLL diagrams and also you can buy stuff via them as well. Great for Bolts etc if still in stock https://www.lllparts.co.uk/catalogs/vw
Was looking back over some old posts that would've originally had links to images from 7Zap... even they're broken and gone now, starting to look like the whole thing's being slowly pulled.
7Zap recently had a bit of a make over involving them partially obscuring catalogue numbers whereas previously they were written in full. You could get around it by clicking a link and it took you to a new page where the entire number was shown... made things a bit long winded and couldn't see the point of it, everything was still there somewhere. Tonight, it makes sense and presumably they've been building up to it... if you click on that same partially obscured link, it now just takes you to a semi-blank page, no more complete part numbers (unless you join a fee paying subscription).