[time-nuts] Are there any company selling refurbished/reconditioned Cesium tubes?

[Taka Kamiya]

I have a Datum FTS 4040A.  I believe the tube is original but it is still locking and staying in lock just fine.  I don't know for how long.  In an event where tube goes soft/dead, replacing it with factory new replacement part is out of question for cost.  Are there any refurbished tubes available from anyone?

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(Mr.) Taka Kamiya
I'm stuck in a wormhole....  Hello, worms!