Mitsubishi MTE2000D, Dig It 258 Mini Ex, Deere Z930A ZTR
Are you needing a whole steering box? Most boxes and columns have replaceable parts and there appears to be a fair amount of online parts and complete box support. A complete box is probably $400-$500. Bearings, shaft, sector gear, etc. is more like $15-$160. You can also try a salvage yard like West Kentucky Tractor Parts