I don't know if you can get the same card again but the website Doctor of Credit lists all the credit card and banking bonuses available. Even if you can't get another SW card, you could get a Chase Sapphire Preferred card then transfer the Ultimate Reward points to your SW RR account. They transfer at a 1:1 ratio so you don't lose any points due to the transfer. I was a die-hard lover of my SW card and swore I'd never drop it but while in a Chase branch (signing up for a $300 bonus for a checking account) we were both offered the CSP card with a 50,000 point bonus. I told the banker I'd do it only for the bonus but I was certain it could never replace my SW card.
Well, that's when I quickly learned that I was almost never earning double points through purchases on the SW card, whereas the CSP card earns double points for all travel and dining purchases. This is for everything from ordering a pizza to paying for airport parking. We got the 2 CSP cards in 2016 right before we put a small addition on our home and knew we'd easily make the spending requirement. We still have both of those cards! I keep the 2nd one as a spare and to put larger, occasional expenses such as car/homeowners insurance, travel, etc. If I try to use only 1 account, it makes our everyday purchases balance appear huge and I start getting panicky. For me, it's better to keep 2 accounts going, so I can keep track better. I can easily transfer UR points from one account to the other.