abs sensor and harness for 2013 thor challenger gt37

If you had a part number, it is easy to search for an alternative supplier. Rockauto.com has the capability to search using a manufacturers part number.
Here is one supplier that apparently has the part in stock for an F53 but I am not positive this is the part that you need.
ABS sensor 2013
I should add that once you have the part, it is a simple DIY replacement. No need to pay the dealer labor and mark-up unless this is something covered by warranty.