I can help you to determine if the LaSalle Bristol CrossBreeze Adjustable Toy Hauler Screen # 3441409200PBK will fit your 2009 Forest River XLR 37X12SA, but I cannot say it will as I do not have access to all the dimensions on your XLR. This screen is for a door opening 92" wide. Here is a list of all the different width door opening screens we carry.
80" # LSB74FR
92" # 3441409200PBK
96" # 3441409600PBK
96-5/8" # 3441409662PBK
97-3/4" # 3441409775PBK
99-1/8" # 3441409912PBK view full answer...