As of yesterday (July 11), they were still available in at least one Central Texas Costco. On another recent post-Jul 2 date they were still available at a different Central Texas Costco location.

Another clue to a product being "deleted" (Costco's term) is an asterisk after the price. There is no asterisk on the SWA gift card price signs I have seen. I do expect them to be deleted at some point, and then return at some future point.