1970 dodge travco 270 window options

[DivinylRecords]

my 1970 270 finally has all the mechanical issues ironed out, rebuilt engine, custom exhaust, headers, front drum to disc brake conversion. rebuilt carb. she runs like a top. now on the coach. ive gutted the whole interior. and im saving money for the new windshield which is quoted at 2700 after install.. that's about what I paid for the rig..ouch... anyways all the side windows leak really badly, the gasket is cracked and rotted.. rv glass experts said they couldn't source the gasket for the side windows they could only get it for the windshield. I read something on here about someone scrapping the windows and using a screw in style.. Im familiar with mechanics of cars but the windows and building the interior is a new project for me. anyways all the windows leak and I cant really start to do any remodel inside till I get this fixed. any ideas.. ? If I find the gasket close enough I assume I could silicone the rest of it up tight enough? but still caNT source the gasket

[TerryH]

Photos may help.
As well, please, please stay away from silicone for exterior use!