1. Build more F-22s - this would be nice, but it just isn't going to happen under either administration. They're a great aircraft but too expensive. The Aussies and Israelis want to buy some, which would help lower our costs and keep the production line going, but for some reason they have been turned down.
2. Keep F-15s flying to supplement the F-22s. The F-15s are wearing out and disintigrating on their own and won't last much longer.
3. Supplement with F-16s - might be our only option.
If you've got any ideas, I'm sure the Air Force could use them. They've been pretty screwed up in recent years.
The only nations which can afford the F-22 Raptor in meaningful numbers are Japan and Saudi Arabia(who have gone in for the Eurofighter).The Aussies don’t have the budget and Israel would need US mil-aid.
More like six+ decades.