Accutron Battery

So I am tossing this out hoping someone knows… typically don’t see questions like this on here:

Where online can one purchase the battery gaskets (bumpers… you know what I mean) for Accutron batteries? Or can I buy batteries with the pieces on them already, somewhere? 

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As someone with a 1976 Accutron sitting in a box, I’d be interested to know, too.

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https://mccawcompany.com/product/accucell-battery-bulova-accutron-214/

Here's a link to one retailer.   The battery is an Accucell 1.35V.  You can find the battery at other retailers. 

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Renata 387S (comes with the spacer ring) should work just fine.  Those Accucells that someone else recommended work as well.