Here is a new mount to fit both the Western Suburbanite and the Fisher homesteader plows. This comes with the mount and hardware. This one bolts to the 2007-2011 Chevy GMC with the 1500 frame Silverado Sierra Suburban Yukon Avalanch. The mount # is 31553 If you need the receivers that go between the truck mount and the plow they are listed here.
31553 GM K1500 All New Silv&Sierra, Tahoo&Yukon, 1500 Subruban&Yukon XL 2007-2011 Install Instruction

31553 GM K1500 All New Silv&Sierra, Tahoo&Yukon, 1500 Subruban&Yukon XL 2007-2011 Parts List

This fits the trucks listed below

2011, CHEVY/GMC, K1500 SILV/SIERRA

2010, CHEVY/GMC, AVALANCHE 1500
2010, CHEVY/GMC, K1500 SILV/SIERRA
2010, CHEVY/GMC, TAHOE/YUKON 1500

2009, CHEVY/GMC, AVALANCHE 1500
2009, CHEVY/GMC, K1500 SILV/SIERRA
2009, CHEVY/GMC, TAHOE/YUKON 1500

2008, CHEVY/GMC, AVALANCHE 1500
2008, CHEVY/GMC, K1500 SILV/SIERRA
2008, CHEVY/GMC, TAHOE/YUKON 1500

2007, CHEVY/GMC, AVALANCHE 1500
2007, CHEVY/GMC, K1500 SILV/SIERRA "ALL NEW"
2007, CHEVY/GMC, SUBURBAN/YUKON XL 1500
2007, CHEVY/GMC, TAHOE/YUKON 1500