I found a guy who had both these sets of Sigma Salt and Pepper shakers for sale. It took me two days to finally get a hold of him and luckily he still had them. I just got them today.
Fantastic condition, all with the little stoppers in the bottom.
Here's the best part. They were $20 for each set.
I also noticed something interesting. The yoda shakers are almost identical to the yoda on the Sigma vase (same size and sculpt, but the head on the vase is slightly turned outward from the tree). You can also see that it was a separate piece from the tree as well. Interesting.