If I recall correctly, the means to manufacture new F-22s isn't out there as the tooling and plans were destroyed. I remember reading this a few months back.
https://nationalinterest.org/blog/the-buzz/new-report-reveals-why-there-wont-be-any-new-f-22-raptors-25736
http://www.thedrive.com/the-war-zone/20633/exclusive-heres-the-f-22-production-restart-study-the-usaf-has-kept-secret-for-over-a-year
I think it was dumped in favour of the F-35 programme that has best chance of export sales, even though it has massively over-run on costs.