Over the years there have been many errors on their website, that's just one of many, you won't find the 35 Rem either, but it and the 35 Whelen are both in current production, they only sell them regionally tho, the 35 Rem has been offered in a combo with the 444 Marlin also, another model that you won't find on the website.
On my rechambers, I only listed the "by hand" note for those I've personally done myself, if it isn't marked, they were done by a gunsmith on a lathe. The 45-90/100/110 and 454 Casull should be marked confirmed, they've all been done by hand, the Casull reamer is one of the GBO reamers I loan out, see the reamer sticky.
Tim