They're a new company who only popped up in 2018.
Superb capsules. I was really intrigued by their stock capsules so reached out to them to custom build some K47s for R&D for my microphone company. I ended up only using about 20 of them so I sent the remaining 30 out to people here, some for free when I could afford it and most at or near cost. I sent one to
@kingkorg and it was the most consistent QC on a K47 he'd ever tested (including boutiques and first party Neumann capsules). They use the same overstock backplates as some other small capsule factories though.
Incredible assembly QC (I cannot stress this enough.) held back by backplates that unfortunately are only medium good.
On my order of 50, the rejection count was 5, and it was all cosmetic. 90% of them were within 2pf of each other front to back and 100% within 4pf. Front to back matching was better than vintage Neumann and about equivalent to current Neumann. The only issue is that they sound different because the backplate specs are off. Not bad, just not drop-in replacements for other capsules. I would say 3U capsules are better overall because they have better backplate geometry, but FZ has better QC at 2/3rds the price at volume.
The only retailer I'm aware of that stocks them is Dachman. For singles, Dachman sells them for $99 as their "Series 2" line which considering import, stock and making a living is not a horrible scam. Most parts peddlers sell much cheaper capsules for much more. I also have 6 K47s left at time of writing if you want to test one out, but they're not their catalogue capsules, they're a bit different. I did like their catalogue capsules though.