You can prob find them at a junk yard or something if you knew what locations they were at... do you have a bentley manual or anything?
Some ppl sell them cheap. I got mine off a dude who is parting out 90-91 CQ and has a few of the parts I Need. Some of the relay spots are supposed to be empty.. i guess it depends on what kinda stuff you have in your car

 

I have no manual. didn't buy one and dont need one. Audi was build on engeener mind. all can be solved by logic in audi. I found relays on www.maximumautoparts.com cost like 5 -15 bucks each.