Amazon with qbk has the well-reviewed QBK 3/4 Unisex Orthotic Shoe Insoles w/ Arch Support (Blue) for $18.98 - $9.11 with coupon code QBKINSOLES [Exp 3/15] = $9.87 with free shipping on $35+ or with Prime.

Available in Men's sizes 6.5-8.5 to 11.5-14 and Women's sizes 6-7 to 12.6-15.