I know that on my '02 ST, the front driver window is the same window in the '95-'01 Explorer. I had the driverside window replaced with one that used to be on a '99 Explorer.
I also know that the front seats out of the Mercury '97-'01 Mountaineer (same as the '95-'01 Explorers) directly bolt on my ST. I replaced both front seats with power/lumbar/plush from a 2000 Mountaineer
It also appears that various interior parts, especially the dash and center console parts are similar if not the same as those on the '95-'01 Explorer, '97-'01 Mountaineer and the '96 or so - 2000 Ranger.
Furthermore, it's possible that parts from the '96 or so -2000 Mazada B-series trucks may mix and match as it's basically a Ford Ranger.