i believe you are somewhere in RWP/ISB
look for @Sheryar @aamir567 or somebody from IJC, they also have a thread over PW , all are quiet resourceful & helpful.
for very long i have an eye over such troopy (long chassis RKR HardTop) model year 96, it is a real basic ambulance 3 seater empty rear cabin with bench seat horizontally extended behind driver, bubble roof & barn doors, resting in shade over blocks at a sindh govt hospital since 14+ years. It has a yellow plate x-11 as donation vehicle.
my last offer was 500,000 with papers before COVID. The hospital registrar was looking at 700,000
Good luck.