Ford has delivered 2nd Gen. Expys with two different types of roof racks.
One has a nearly flush slotted track running fore and aft on each side with two quick adjust cross bars.
The other has a raise side rail down each side like is common on mini vans, etc., with two cross bars between them.
I have been unable to pin down which were used on which models. I have seen both on Eddie Bauer's, and I think I have seen both on XLT's.
I am inclined to think that it was an option to choose which was preferred.
I have not looked closely at 1st Gen Expy's but I am pretty sure they also have both rack types mixed among the different models.
When looking for replacement cross bars, make sure you are buying the correct ones.
I needed a set for the slotted tracks... I decided to go with some aftermarket rack accessories from Inno that gave me cross bars that are 60 inches long for mounting bike racks, kayak's, etc. They can be removed or installed in 5 minutes so we then have a bare roof when not using a rack.