Euro car parts had them pretty cheap when I last looked. Make sure you get the right ones - they changed shape in '95!
Which ones do you want? the rectangle ones or the oval ones? I got a set of oval ones lying about whic i had free when euro car parts sent me the wrong ones and didnt pick them back up!
There was some on Ebay fairly recently, not sure if they will still be there though. I'll have a look in a bit and send you the link if they are.
yes and no, the mk4s fit straight in but you have to change the plug at the back, simple job 5 mins work and looks so much better IMO