Lyman primer tube o-ring size?

Golddiggie

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Need to know if anyone has a source for the o-rings on the Lyman auto-primer feed tubes. Talking about the aluminum section of the tubes that goes into the primer feed body. The o-rings on mine (original afaik) have degraded to the point of coming off. I've tried to contact Lyman (via online) but have not heard a peep in over a week. Just hoping someone on these boards actually knows what size o-ring to get to replace these with. I've tried some found at a hardware store, but they're a little large. They need to be no more than .380" OD when on the assembly. Ones I have are several thousandths of an inch over that when installed.

--update--
Called Lyman to see about getting the size/spec of the o-rings. Got two replacements shipping out 'shortly' to me for no charge. Since the woman on the phone couldn't get the tech on the line to get details of which ones to get. Once they arrive, I'll get some measurements so that I can [hopefully] track down which they actually are.
 
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