The Hub Broke It's Rubber

Was going to play some tape this morning on the Otari deck but no luck. It appears the rubber ring that goes around the reel-to-reel hub dried up and broke. The rubber that goes around on the other hub adapter is cracking. Guess this happens after 30+ years.

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I found someone selling an exact pair. Guess what was missing?
These hub adapters work fine and news one although look cool are expensive.
Any experts here that have fixed a problem like this before?
 
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