The big problem with restarting the F-22 will be getting all the small subcontractors who supplied various bits and pieces up and running and into the supply chain again. The fact that a lot of them would be (and were) put out of business by an low production run was a key argument made against stopping the line at 187.
There shouldn’t be much worry about the the A-10 tooling. Boeing (I think) remade the wing tooling for the rewinging effort. And there are LOTS (like, hundreds) of low hours fuselages sitting at Davis Monthan dating from the 1990s Peace Dividend drawdowns. We could probably operate the current number of A-10s (and even support a respectable increase in return to operational service of mothballed ones) for another 80 years with what we have on hand.
The problem with the A-10 is the effort to retire it.
Those that were not put out of business by cancellation of F-22 were put out of business by the disastrous budget sequester deal foisted upon us by Obama, Boehner and Mitch McConnell. Sequester devastated the small to medium sized defense subcontractors that do 90% of the actual manufacturing.