Penn State sell that one.
I think it one of the few that they sell that is forstner bit instead of regular.
I would agreee with John about question why it is needed. Forstner bits are not the best at drilling long holes.
your link takes me to a 9/16 n ot a 9/32 ad. would 9/32 have a metric equivelant possibly 7mm? I have fortner bits to 3 in by 1/16 incremants and have not seen a 9/32