Actually, you CAN get Optima yellow tops from Costco.They can be special ordered if your store doesn't normally carry them.Talk to a manager,it's no big deal.I work for Costco,we get our battery shipments weekly,so you could probably get one within a week. 
Thanks DesertRat, I thought they could probabely special order one for me, but since I drove my truck there with the damaged battery, pulled the battery to exchange it, I had no choice but to replace the battery while I was there.
Thanks!
