RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
in general oem weights are never 'cheap'
many of us make our own weights.. either out of plate steel,, or cast concrete.. or repurposed other weights. like barbell blates and a rod made to a bracket.. etc.. fitting a bumper or etc...
I bought aftermarket rear wheel weights from my Kubota dealer. They cost about $1.00 per pound. Everything Attachments sell the same ones, but they only sell by the 1/2 ton. I added about 350 lbs. The tractor feels much better on slopes.