I get mine at www.TheHealthHound.com
The 15' strip of pH paper with dispenser sells for $7.99 and the 15' refill roll with color chart sells for $5.49 each. The shipping via USPS is only $1.00 for the first roll plus .25 for each additional roll which is a bargain considering the cost of gasoline today to go pick it up at your local health store. I used to have to pay $13.99 here in San Antonio at my helath store. Hope this helps.