Hi Tim, Did you ever find a good glazing vendor? My sliding windows have a latch that fits over the edge of the glass. under the latch is a strip of U-shaped rubber. Is that what you are calling "glazing"? I'm looking for some replacements.
Butyl tape from the automotive industry, get 1/4 or 3/8 and you never have to worry.
I have redone all my windows..........why take a chance. Those factory gaskets are very poor quality.
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2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-7000 lbs.
Dexter Axle Lift 4-9/16" - installed with sub-frame.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
Mine have shrunk about a inch if I had pulled mine off and reinstalled I do not think I could of got it back in the channel, Jayco parts site may have some I know there are some other sites that sell replacement gasket do a Google search and you will find some.