plexi glass sheet

[Bsixxx]

looking for a plexi glass sheet for my monitor enclosure. Looking for either (6'x4'x 1/4") ,(6'x4'x 1/8") or (8' x 4' x 1/4") or (8'x4'x 1/8")
looking for either one of these demensions..

I am located in socal. let me know
or any glass sheet/window you don't need etc..