Originality when- no one can see it

Been thinking about the restoration of Miss April and how far to take the originality quest.  Whenever possible, I repair what original pieces can be restored- like the chrome.  By the way, I hope to get the seat hinges back later this week.
However, sometimes a part simply has to be replaced because no repair is possible.  The steering coupler is an example of such a part.
What I was thinking about is how far to take the originality plunge.  The steering coupler cannot be seen once it is installed.  There are several versions of couplers that are being produced that are much less expensive than buying an original OEM part from PORSCHE.  In fact, the new designs might be better than the original.  So, is it better to get a newly designed part and put it on Miss April?  No one would ever know, and the replacement part would cost more than $150 less than the OEM part from PORSCHE.
I guess the photo below shows how I am answering this question.  Having gone this far repairing original parts or finding NOS parts, might as well do the same thing even when the part cannot be seen.
This does not make Miss April better, it just makes the car restored the way I want it to be.
There will be more parts on the car done this same way.
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