Okay after much thought I managed to come up with this and did all 10 of the windows on my bus application is easy the first window took about 15 mins to figure out a plan then after that about 5 mins per window.
The screen is on the inside so when the windows are closed for travel mode they will be protected.
I used 1/2 foam backer rod $3
screen frame kit with spline $10
fiberglass screen $7
I cut the screen frame to fit into the channel snugly to run vertical between top and bottom channel
then cut the screen larger than the window
jammed the screen in place using the 1/2 foam backer rod as a spline in the channel around the upper curve and a piece along the bottom
then used the spline that came with the frame kit to secure the screen into the vertical screen frame
then trimmed off all the excess screen.
Jabbing the backer rod into the channel to hold the screen
picture below the excess screen is ready to be trimmed off