Called them and they are out of stock.
Todd said he is not making them anymore so I guess I need to find something else.
The Porper rear collets will work but I was looking for something a bit more precise and durable.
Porper makes a rear chuck for the Model B. Or if your going to change the front chuck out and buy a 6 jaw. Use the original on the back and see if you can buy just the adapter from Porper or have somebody make one.