I spent 2 hours walking around the warehouse at my local Ford only yard, a place I have been going to for years where they know me quite well.
You can explain to them what you are looking for over the phone for 7 hours and get no where, or you can give them a list that says exactly what you need, or you can walk around and find it yourself
Trying to explain to them why you want these parts is kind of futile unless they really understand what the hell you are talking about
Its better just to give them a list,
say:
I need manual transfer case from a 97-2001 F-150
I need front driveshaft from 97-01 F-150 or from 97-01 Expedition
I need rear driveshaft from 97-01 expedition 4x4
dont expect the t case to still have the linkage attached, because the linkage mounts to the transmission. You may, like many of us, have to get those parts from the dealer.
I found half the linkage I needed on a transmission on the shelf, they did not mind me having it once I explained to them what it was (again this is a yard where they know me, I am allowed to walk around their lot when others are not allowed back there, probably because I have spent $2K+ there over the years hahaha)
I ordered the shift arm and the shift lever from Ford because no yard had them.
This T case may not be easy to find but they are out there so dont give up with just one phone call, I spent months collecting parts and explaining what parts I need over and over.
Make a list of parts, keep checking the local ad's, craigslist, online suppliers, and best of all junk yards.
I got all the parts I needed from about 6 different sources, including the dealer, a ford only yard that had a t boned expedition for the driveshafts, my buddy had the t case, then I contacted about 20 trans case rebuilders until I finally found one that had a cracked 4406 and was willing to ship me the tailhousing, speed sensor and drive gear I needed.......bottom line = be patient