security screens

[maxermack]

i've been trying to find security window screens for my 1990 e350, and the only two sites i've found--americanvan and goamericantruck--only have screens fitting 1993 and newer econolines. anybody know another place i could look?

i suppose another question would be if the window sizes are similar enough between the years that i could modify the screens to fit.

thanks for any help.