American Classic has shown this:
Side Rear Window Seals and Channels
WI142 1947-55 Glass wedge rubbers, side rear windows, Suburban, set of 4 wedge rubbers that hold the sliding glass channel tight against the body, use with WI207 $48.00 Set Add to cart
WI207 1947-55 Window channel, side rear windows, Suburban, set of 4 pieces, enough for one truck, use with WI142 Discontinued
WI800 1947-55 Glass rubbers and window channels (WI207 and WI142), sliding side rear windows, Suburban, set of 8 pieces Discontinued
Brothers truck parts lists "a complete kit for $159.00
"This completes set replaces all rubber seals, glass channels and felt weather strip on your Suburban side windows. For 1947-54 Suburban. This is a complete set."
Jim Carter still seems to list most of the items separately
http://secure.oldchevytrucks.com/Suburban-Side-Qaurter-Window--Rear-Doors/products/718/.
