Use the 'contact us' icon and e-mail them. Barry is my rep and he should be able to help you out. I don't know why they still don't have their online store up yet.
Anyway, they are who I buy Magnum Upholstry Shampoo from.
On really bad carpets, it is better. For normal soil both clean very effectively. At $9 a gallon (I think that is still the price) it is a heck of a lot less expensive then Woolite.