As discussed in July of last year. Dr Denny Anspach posted the update below
The owner of Reboxx is a personal (beyond modeling) friend, and he has asked me to report that at the moment Reboxx is in an interim quiet period, and that it is NOT going out of business. The family member at the business end of the phone is now out of state.
Also at the moment, they are completely out of 33” wheel sets with 1.020, 1.025, and 1.030 axle lengths with no known date for replacement.
Brian J Carlson.