Links to unavailable items should have a "No Items Available" page instead of 404
We have many bib records with no items available (Lost, Missing, etc). Unfortunately these still show up in "similar item" suggestions in the catalog.
Currently if you click on one it takes you to a 404 page.
Once on the 404 page, you can't simply click back to go to where you were, since that seems to take you to a page that forwards you back to the 404. The only way to go back is if you hold down the back button to go back 2 pages (which many users will not know.)
Example of the issue:
https://youtu.be/2TrY1TjndxU
Since it is impossible to hide these unavailable items from suggestions, can we have a page that says something like "we're sorry, all items are currently missing or unavailable"?

Hi Michael,
We were taking a look at your Syndetics information today based on your feedback to Danette. There is a problem with your synchronizations that is currently being fixed by support. You should not normally see 404s when you data is synching properly.
Best Regards,
Samantha Cunning
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Michael Biggs commented
Oh, OK. Thanks!