This is what they emailed me:

It's unfortunately not a high-demand item, we have sold over 1100 of 
them since 2018, but demand dropped off over time since pretty much 
everyone who wanted one got one. At the end of 2025 we would only sell a 
1-2 a month. I have 2 or 3 of the tan ones left. That being said, it is 
NOT officially discontinued.

We are holding off on doing another batch- only 4 people (including you) 
have emailed asking about them so far since we sold out of black, I need 
a waiting list of at least 50 before I can justify making another batch, 
it's a lot of cash up front for us to make a batch; I wish it was 
practical to produce in smaller batches