I did find the Window latch retainer kit,, ie bolt. It does include the pins for the latch itself unless different latches use different pins.
E4UZ-15302A02-A
NOS 1980 - 1989 FORD E150 E250 E350 QUARTER WINDOW LATCH RETAINER KIT | eBay

I noticed that the part number starts with "E4UZ" That would be a 1984 part number.

The latch part number I found for a 1980 to 1983 is E0UZ-2227158-A. That is a 1980-1983 part number. I would bet that the part number he needs starts with E4UZ
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EDIT: This might be the part you are looking for... A bit high priced but i guess that depends on supply and demand
E4UZ-1527158-A It appears it does not include the latch retainer kit/bolt and pins part number E4UZ-15302A02-A
http://www.ebay.ca/itm/NOS-1984-1991...9Ww~Sg&vxp=mtr

Here the latch part # E4UZ-1527158-A looks different from the Ebay part.
https://parts.lakelandford.com/p/For...Z1527158A.html

 

See, some do miss you JWA