Finally another rat lover!
As you can tell by my username, I am "owned by" a rat. His name is Master Splinter and he is a 10 month old chinchilla berkshire. I got my Splinter from a breeder, so I had a bigger choice and I got to see the parents and living conditions. I found the breeder through classifieds.yahoo.com. Maybe you could find one through the classifieds in your area. You may also try going to Fancy Rat and Mouse Association on the web (forget the address) or just try putting rat breeder (your state) or something like that. Hope this helps. Sorry to hear about your loss!