You can purchase pet patterns at fabric stores. I bought two recently at JoAnne Fabrics. Wlamart, or Hancock fabrics would have them too. They are i the craft section of the pattern books.
Once you find one you like, you can personalize it with things you like best or reshape the pattern to suit your baby.
http://www.simplicity.com/index.cfm?...=32&startrow=1
Check out this page. I bought 3925 which has some dresses and also 3939 for the PJs.