Where can I find Golden Ticket invitations?

I am planning a surprise party for someone's 30th birthday. Their favorite movie from their childhood was Willy Wonka and the Chocolate Factory (from the 1970s). I am not happy with alot of the golden ticket invites some of the vendors put out, I found one that I did like but it was from the UK, I'd rather buy from somewhere in the states. I want to order customized golden ticket invites. Any idea where to go?