front tires for gr2020

hi i have a gr2020 i use it for plowing snow I find that the front tires are turf tires and don't have enough bite for deep snow they just spin and spin im looking for a lugged snow /mud atv tire for the front the tire size is 16 x 7.5 x 8 any recommendations? also I seem to have a bit of trouble finding them in that size]] I have tried amazon and farm and fleet and end up with different sizes but not that any suggestions>