I used Easy EDA. Its connected with JBL PCB and makes ordering your board pretty easy.

Here are the keycaps on amazon

To answer a few questions:

~ I used Easy EDA to design, and JBL PCB to manufacture.

~ Here are the keycaps on amazon.

~ Using Cherry MX PCB mount switches

~ It looks like there is some interest in making this available for purchase, and after i adjust a few things, ill check out my options to do so.

Here they are on amazon

this set from amazon https://www.amazon.com/gp/product/B08QJGH5VT/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1