I think it's interesting that the manufacturer of this lock found it worthwhile to make a model which is specific to the Andersen Ultimate. Either there are a lot of Ultimate hitches sold, or their manufacturing method is quite flexible and able to efficiently make single units of the desired design.
The web page description says
This lock fits both the original Ultimate as well as the newly updated version with the alignment "funnel" as well as accommodates the chain eyebolts if you have them...
... but it's not obvious how it handles the funnel - this is an important feature, but the result could be an enormous steel box.
It does seem a little strange that Ft. Knox would show an obsolete version in the Amazon store, but perhaps they are just behind in site maintenance and would ship the current version.