Scott Scheper commissioned a custom made cedar two drawer wooden slip box in 2022 and listed it for sale at $995 (including shipping) and later dropped the price to $495. See https://www.antinet.org/wooden-antinet-waitlist for details.

While it looked a bit rough hewn, he mentioned that it did not include either following blocks or card rods. At 12.75" deep it ought to comfortably hold about 3,000 standard index cards.

Based on his initial marketing and presentation as well as an email address box for collecting emails as a "waitlist", it would seem that he was A/B testing the idea of marketing and selling these as an ongoing product.

One will note that they can get rare vintage ones in excellent condition online for nearly a tenth of his original list price! Restored fine furniture versions with several dozen drawers can be purchased in his original price range as well.