Went to Autozone and picked up a Melling JB-969 lifter for $3.69 . On the box is said "made in the USA" . Has ball check-valve and flat disc oil metering with wire retaining clip. The picture shows the two-part lifter body with the hardened foot, this is particular to Delphi lifters only. So it looks like for the time being, Melling is sourcing their lifters from Delphi.