I'm saying buy it while you can, and don't tell them that it costs big bucks from Ford, when they had it. I got everything new from Ford for the rubber seals, the back door small glass(only way to get the seals), and that's when I learned that the quarter glass was $480ish back then(2008-2009).
When the trucks are rare in the yards, what is left will have bad rubber, the sun will have damaged all of them. My 1998 shows the start of the rubber cracking around an edge or two.
Find some great glass pieces, and get them now.