Amazon with Iwillink has the 10-Pack of Iwillink RJ45 Cat6 Female to Female Shielded Inline Couplers (Silver) for $14.99 - 5% off coupon (check "Apply coupon" box) - $5.25 off with coupon code 35GWJOPG [Exp 9/30] = $8.99 with free shipping on $25+ or with Prime.