Yeah, it's kind of funny, I have a short list of discontinued and unavailable items that I still keep searching for, hoping that one day I find some shop that happens to have a dusty old package in the back. My holy grail items:
• The Kyosho or Qtec bumper for the Porsche 962
• The Atomic AR-265 DPS, the disk damper for their 90mm MM (see picture)
• The Levitezer magnetic front suspension
• Certain aluminum wheel sets from obscure japanese/chinese brands in the correct offsets
And I'll grab almost any Ferrari 458 body if I see one.