Over the holidays a friend's kid had a toy that happened to have the right sized and shape sucker for K-9's eye! I traded some 3D glasses for one of the suckers they had. They don't remember where they got the toy but I am keeping my eye out for anything that looks like it.
I also did a bit more dialing in on all the gadgets and motors but nothing worth reporting yet. Here is two pictures of what the sucker looks like.