I’m looking for a set of low miles non MDS lifters from a 6.2 or 6.4.
You are probably better buying new lifters. The lifter faces of used lifters have taken a "set" with the cam lobes of the engine from which they were removed. There is some risk all lifters and cam lobes will adapt properly. If not a lifter face may wear or the lobe may wear and the lifter/lobe will be noisy (tick) or a cylinder will be down on power.
Even with new lifters and a "used" cam the proper adaptation may not happen with all lifters/lobes but the odds are better.