Kicking myself for doing this, but during our the renovation of our 1979 Excella I threw-away all of our Plastic Window Guide Frames because I did not think we would need them. Well, it turns out we do need them because they keep the bugs out! Now it seems they are nearly impossible to replace. Anyone know where I can find these:
Airstream Supply used to have them but looks like they're no longer in stock...
My backup plan it just to adhere some sort of rubber strip to the backside of the window frame, then run a slit down the middle of it to allow the window lever to move up/down.
At this point, all I really care about it keeping he bugs out.