I got lucky. A while back, the Exolens Zeiss lenses could be found for less than 50% of their standard high prices, so I plunged and bought the tele, wide, and macro. I guess that Zeiss pulled out of whatever arrangement they had because you don't see those lenses anywhere any more. Unfortunately, I'll likely have to abandon them when I move up from my iPhone 7 because you can't get mounts for any later phones.
From the images I've seen, the Moment macro is the equal of the Zeiss, so that's what I plan to get when I get a new phone.