From what I recall of my talk to Romano, the VW's were never built in Pakistan, and never imported as a car dealership item for sale, they only came into the country when Churches brought them in to use as kids school buses. So very very few ever came into the country. When there is no dealerships with parts to use for repairs, they don't last long, and never as long as you'd expect. Once a motor has a major problem, that's it, and the motors get replaced with modern easy to find diesel engines. If I have any of my info wrong, please correct me so no one gets misinformed!
images via: http://picasaweb.google.com/vwclubpk/VWCOPShutterbug#
For the most incredible resurrections of other 21 or 23 window VW mini bus:
http://justacarguy.blogspot.com/2010/12/1957-deluxe-vw-23-window-bus-pulled.html
http://justacarguy.blogspot.com/2010/08/not-too-far-gone-to-save-because-in.html
http://justacarguy.blogspot.com/2010/12/what-happened-to-bury-this-1950-vw-213.html
http://justacarguy.blogspot.com/2010/12/1957-deluxe-vw-23-window-bus-pulled.html
http://justacarguy.blogspot.com/2010/08/not-too-far-gone-to-save-because-in.html
http://justacarguy.blogspot.com/2010/12/what-happened-to-bury-this-1950-vw-213.html