You can find it also at any store that's big into canning like True Value, Ace Hardware (out in the Bonnie's where they still can) places like that. There's McClendon's by me but think along the line of canning or go to the Mrs Wages PL main web pager and look where they sell it. I've used it mixed with vinegar for years with success. Follow this link:
http://www.mrswages.com/Page/Where_to_Buy.aspx
hope it works for you and let me know I can send you the ratio to us.