I checked in to those a couple years ago for curiosity.
They are no longer made. Haven't been made for several years.
I doubt you can find any. Your only chance would be farm supply stores because farmers used them a lot for muddy fields.
I suggest instead that you get some Trxus MT. Preferably in a tall skinny size like 255/85R16, or maybe some Maxxis Bighorn, or Hankook Dynapro MT.
Warning: I often edit my posts a few times to get them complete, or to correct errors.