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 2004-2010 Chevy GMC Colorado and Canyon. The mount # is 31543 If you need the receivers that go between the truck mount and the plow they are listed here.
31543-1 Chevy Colorado & GMC Canyon 04-10 Install Instructions

31543-1 Chevy Colorado & GMC Canyon 04-10 Parts List

31543 Chevy Colorado & GMC Canyon 04-05 Install Instructions

31543 Chevy Colorado & GMC Canyon 04-05 Parts List

This fits the trucks listed below

2010, CHEVY/GMC, COLORADO/CANYON

2009, CHEVY/GMC, COLORADO/CANYON

2008, CHEVY/GMC, COLORADO/CANYON

2007, CHEVY/GMC, COLORADO/CANYON

2006, CHEVY/GMC, COLORADO/CANYON Z71
2006, CHEVY/GMC, COLORADO/CANYON Z85

2005, CHEVY/GMC, COLORADO/CANYON Z71
2005, CHEVY/GMC, COLORADO/CANYON Z85

2004, CHEVY/GMC, COLORADO/CANYON Z71
2004, CHEVY/GMC, COLORADO/CANYON Z85