One thing to check, I believe that in 2008, the Endeavor was on the RR8R chassis
with 8 airbags, while the Knight was on the RR4R chassis with only 4 airbags AND
the trailing arm failure problem. Given that, I'd head for the Endeavor.
(HR Endeavor maps to the Diplomat on the Monaco side, not the Knight).
2002 HR Endeavor