Amazing! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300145544764&fromMakeTrack=true

Is this a trick question?

Made in Japan Alembic neckplate, must have one...

While there are Japanese-made bolt-on Alembic basses, they didn't have neck plates.  Giving the seller the benefit of the doubt, these probably came from one of those cheap P-bass knockoffs with the Elan stickers on them.  
 
At least he wasn't trying to get $49.95 for the neckplate.  He was only selling the parts for what they were worth...