There is a big hammer website out there somewhere, it's a weird address, I forget what it is, I think Rob knows it. You can order big hammers from bigfishtackle.com I believe. Look around on some other online tackle shops. If I come across any online, I'll let you know. You can always order them from a tackle store if you can get their phone number, or website, I'm sure most of them would be happy to mail you some.
-Brian