3 of them on there. here's the cheapest.
http://cgi.ebay.com/NHRA-Wally-Natio...d=p3286.c0.m14
There's one for a 450 buyout.
Here's what I'd do. It seems that a lot of companies make replica Wallys and give them out to contest winners at their location. I would try to contact them and see where they get their replicas made.
OR
http://nhra.com/contacts/index.html
Ask them how to obtain a wally to give for a gift or ask if they could recommend a place to get a replica made.