There was a very nice M715 in white for sale on PW in Islamabad if I remember correctly and the demand was also reasonable, the vehicle had been completely restored to stock and from the pictures it seemed like the owner had done a really good job, perhaps if you search expired ads you can get in touch with the owner,
as for Karachi, I've seen a number of M715s near Hawkesbay, take the road towards turtle beach, after paying the toll keep going straight, from the police station take a right, there about 600m into that road keep looking on your right and you will find a number of M715s, some of them are in use and some are just standing there since the last few years but in very easily salvagable condition.