I will be the party pooper on this one(Sorry!)
But - what PAF "want" and what Pakistan can deliver are two entirely different stories. Lets not take seriously any nonsense about stealth versions of JF17 (ergo PFX) being done in Pakistan. The very concept is a joke. Pakistan has not designed, developed, delivered, certified and manufactured a single home grown plane of any type ever, so the idea that Pakistan can do a stealth version of the JF17 is a joke. I am not even going to sugar coat it.
I am quite optimistic and gun-ho about Pakistan developing homegrown solutions, but even i will draw a line at this joke of a stealthy JF17-PFX...
Sorry - but "Indigenous collaborations" will be as useful and successful as the Tejas programme.
Thankfully PAF has real options like J-35AE and Kaan for stealth ...