I have had to make do with "retrofits" in many vehicles I've owned, including a couple of trips to the hardware store, whenever the factory alternative got too pricey. But $800? The whole impact strip doesn't cost that much!!!
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car