I got my most of my 1/4" Lexan at Home Depot here in town in West Michigan. They have both, Acrylic and Lexan in stock but not a large selection in the thick sheets up to 36" X 72" in size. It's also available at a local place called "The Glass Shop" and that's where my last thick Lexan came from for the storms that I made for our 2007 Sunline Solaris TT's storm windows about 16 months ago. I had them order the lexan and the aluminum "C" channel window frame material. Home Depot wouldn't or couldn't get the "C" channel so I went to The Glass Shop.
Check with the special order desk at the Home Depot or Lowes or Menards. Another place is any Ace Hardware. In your area, thick Lexan might not be a normally stocked item.
