I have a covered porch and want to enclose only one wall the porch is 20 ft long and has 1 support mid way. This side faces west and I want to keep the wind rain snow from completely taking over. I have used tarps to keep out the sun in the summer with some success. I am tempted to buy 2 large sheets of plexiglass and mount them thus breaking the wind/rain/snow but allowing light. Summer I could use a rod to hold curtains to keep hasrh sun out. Where would I buy 2 sheets of plexiglass 8-10'wide and 5-6'long (it doesn't have to go all the way to the floor there is a handrail there now. Any ideas?