Never heard it before but its a bit ritualistic to me anyway and the fact it's kept in house as such and we know the quality is excellent printed by one of our own keeps it special though thanks for the heads up.Have you guys had a look at some of the 'print-on-demand' online t-shirt stores like https://teemill.com/?
You'd be able to have a permanent HBF store, for free, and just upload the designs. Then anybody can buy a t-shirt at any time and whatever size they need.
Not sure what the cut of the profit is though.
Thanks for the link Kohota, @dan125 has been printing the forum T shirts since 2016 there is no profit involved and he is the only one who has permission to use the forum logo.