well I have got a personal experience back in 2008 , bought a new mehran cng and installed an after market A/c which was denso ( brand new ) , I think i paid 22500/-
but wasnt worth , in direct sunshine car heats up and in the evenings a/c works but its only enough for the driver as having only two ducts, i am not completely satisfied will change the car next year ..
My friend installed success A/C in his 2005 mehran , accordin to him it works quite better than denso .
Hope this will help regards