who to trust for hydraulic flat lifters these days?

Title question pretty much spells it out. If I can't find any "made at least 25 years ago" and have to buy more current stock, who's good, or at least "less bad"?
I have a set here that (I don't know why anyone would keep old used ones around) I bought from a swap meet, I know the guy who sold them, all he remembered was that "I've had them around forever". I thought I was getting some Direct Connection NOS ones but looking at the bottoms I can tell they've been used. someone did a cam swap...

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Author: volaredon