I went through quite an ordeal today to get eight inch pans. I tried four different stores with no luck and finally found them at Walmart in the craft section. This cake better be worth it!
For anyone else wanting to find eight inch pans, let me save you some trouble. You can NOT find them at any old store with cookware! Target and Bed Bath & Beyond do not carry them (at least not the ones around here in Oregon).
You can get them at Michaels or Walmart in the cake decorating section, you can order them online (see here, here, or here), or you could try a specialty baking store.