For the third time since entering the golf equipment realm, the membership-only warehouse club has run out of stock of its popular golf ball. Following a small disappearance in the winter months, the Kirkland Signature was witnessed on shelves in Costco stores during the Masters. But until this week, the ball was not available for online purchase. Yet the chain released a quiet rollout of the product Tuesday, giving the hungry masses another shot at the sought-after four-piece ball.