Cheap inductions can make that possible. We can source parts from USA/Turkey. Remember the Mirage III/V Pakistan picked from around the world?
Libyan Mirages were a gone case, but some of them were put into service.
If we want to increase the F-16 fleet, then new build is expensive, old ones allow us to replace the Mirage/F-7 units quickly. Because JF-17 blk 2 deliveries will take at least 4 more years to complete. We can have Superior weapons today. that is what matters the most.
F-16blk15 MLU or AM/BM versions that are MLU-ed, offer more payload than Jf-17s in any case. I'd rather have a 6 ton payload than a 4 ton.