I've never seen a success from Hayden ttm, but she does have a website (PanettiereCloset.com ) where she auctions off clothes from her closet to benefit "Save the Whales" (you had better be a big fan though--the last item was a dress that went for $2,000). The site is currently under construction, but in the past she offered signed photos with a donation to STW.
I understand that she has booked a couple of autograph shows over the next few months, so maybe someone who goes to these could help you out. Best of Luck.