How tall are you? Be careful some XL's may be too small and you may want to look at XXL's.
I have a 1990 Trek 720 and the 23" is too small for me at 6'6".
I did the same as
veganbikes and made my own out of a New Albion Privateer. The 23" Trek is now up for sale.
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84 Bridgestone 400. 90's Basso Highway, 07 Rivendell AHH, 16 Clockwork All-Rounder , 22 Rivendell Roadini