There is no standard distance between the extra two receivers... going to have to build one. If the new bumper blocks the factory hitch on your Windsor, I would incorporate a middle receiver in the new bumper.
This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
Upgraded with a 08 HR Navigator 45โ...