well, Mattel's site does have a few replacement parts for sale....but they are hands and forearms (Lagoona and Holts)...they sell stands there too
AH! There they are. You go to Mattel.com then Customer Service at the bottom then Shop for Parts.
Kind of all other the place, though. Signature Draculaura, Frankie, Ghoulia and Clawdeen have the links for buying stands at $4.60 a pop. The Cleo and Deuce set has links for the stand then Deuce's forearms at $3.45 (can Jackson wear those too?) and Signature Holt's are the same price. They aren't listing anything for the Lagoonas anymore and, of course, nothing for poor Ghoulia. :/