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
Quote:
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...
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... 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.