Very difficult to find just the hitch for a snowblower. I have a snowblower that has been advertised for sale on Facebook Marketplace for over 2 years, but I haven't been able to sell it because I didn't have the hitch to attach to the tractor. I just bought the correct hitch for the snowblower, and it cost me $500 for a used one. Unfortunately, three pieces are missing that I will have to order through parts, as they were inadvertently left on the tractor when it was traded in. Those three parts are almost $500! Mine came from someone who removed it from a BX because they were selling the tractor for a B series and needed a different hitch for the new tractor. The dealer didn't want the hitch if the snowblower wasn't traded back with the tractor. I will be advertising both the snowblower and hitch this coming winter, and I expect them to sell quickly.
Don't forget that you also need a driveshaft, which alone costs about $450. I just searched YouTube for a video and found this one, which will help you understand what's involved in mounting the snowblower. There is one thing wrong with the video, and that is that the shaft is the last thing to be installed, not the first.