I just have to let you guys know that I just received a lab certified analytical standard of 4 dKH from billionzz. It cost a little more then 10 bucks shipped and I am very happy with the product. He has baking soda standards of 4 and 5 dKH along with the lab certified ones diluted using class A glassware and Demin water.
Very professional transaction. I am adding this here so others who are looking for this will be able to find it. Just Google "billionzz" and you will find him.
EDIT: He now has a site setup for the KH standards:
http://liquidarthome.net/khstandard