What oil's for flat tappet, stock LA Cams ?

I'm sure this has been addressed a lot. Sticky ? Stock cam's coming apart because no Zinc in new oils. I'm not wanting to run Brad Penn in a tow vehicle at $11-12 a Quart. I can't buy the additive I got in the past. What's the best option ? I see lots of cars with flat tappets. Not looking to do a roller. No EDM'd, OIL THRU LIFTERs or Ceramic ones. Options ? thanks ! C300