Emilie,
I have that same blue swirly kong that you have. I have put regular peanut butter in there, but I also put in plain yogurt and freeze it overnight and then he can have that as a treat mid-morning - he loves that.
Cody also loves the hedgehog that makes a honking noise, he likes the Flying Squirrel frisbee. He has a duck and frog that when you squeeze them , they make the appropriate sounds and also a Gorilla which he loves to toss around.
His most favorite ball is a Babble Ball. I have 3 different kinds. I have not seen them in stores but
www.onlynaturalpets.com carries them and maybe some other places. They make all sorts of animals noises and say phrases just by him pushing them around with his nose and you can replace the batteries. And he has a ball that lights up and makes laser noises when it bounces - sort of like a superball. I just buy most of my toys from the local pet shops such as Petco and PetSmart
Cody is on the Natural Balance Food by Dick Van Patten. Emilie has listed some good links to get things from and I will add two more. They are:
www.jefferspet.com
www.petqwerks.com - can hear the babble ball on this one. You may be able to order it directly from them, not sure.