Renee G, who is part of the Ump Attire Customer Service Team, confirmed via email, that according to the Buyer for Ump Attire, "They will NO longer be carrying the MiLB manual. It is no longer available for purchase."
I also emailed MLBUmpireCamps. They stated "at this point, we do not have the Umpire Manual for sale".
In case you are looking for other valuable tools, I was able to purchase the 16th edition (2022) of Jaksa / Roder from Rick Roder via his website (~$45) via Venmo (@Rick Roder)
I also found "The BRD" 2016 edition on Amazon.
