I was referring to wanted classifieds on NS and other sites where the classifieds are far more seperate from the forums than they are here. But 900 veiws and no result says its not people with S13 calipers trawling through these wanted ads here either :P

I saw some on booscruising classifieds back when I was looking for them too. Import wreckers are a chance obviously, but you've probably already called a bunch of them. Some drift forums or Corolla and R31 forums who also commonly use S13 front suspension may be worth a look as well.