kensfish.com has the hardness kit for about $5, great price. and lots of food and filter stuff for awesome prices as well.
I don't know if it's accurate or not, but at the bottom of that Snail Bucket page, it states that the site was last updated 8/10/2005. I assume that it means August 10th (MM/DD/YYYY, not DD/MM/YYYY as is used in Europe and elsewhere), since they are located in Missouri.
I would try to contact the seller via the email, and see if you can get a response.