I just came across the empty parts bags while cleaning out my old REX parts after selling her. I found these part numbers I used to install the city light and thought others may find it useful.
(1) 23016-1134 LAMP-ASSY, POSI
(2) 92027-1923 COLLAR, 5.6X8X11
(2) 92075-1912 DAMPER
(2) 25009-004 WASHER, 5.2X16X16X1
(2) 130J0520 BOLT-FLANGED
These parts don't appear on every REX parts list but they are available. I think I paid around $60 for everything.......