iTech Deals offers the MFi-Certified 30-pin Charge/Sync Cable 2-Pack for $6.98. Coupon code "DEALN1OFF" drops them to $5.98. With free shipping and outside of the below mention, that's the lowest total price we could find for two certified cables by $6. It's compatible with all 30-pin Apple devices. Deal ends December 22.
A close price: CaboCable LLC via Amazon offers a similar item for $3.49 with free shipping.
Note: It won't arrive in time for Christmas.