If you'd have asked "Can I fit the steering wheel from my Starship Enterprise to my Series III?" then it might classify as a reasonable question.
On a more serious note yes you can but it depends on how much work you want to do. I've never done it but it is possible, you may have to build some custom bits etc, I don't know. You might be lucky and be able to do a straight swap but it's unlikely.
i think various ones from the austin-rover variety will fit. metros, good old mini's etc.. or you could buy a nice new shiney mountney steering wheel and boss! i saw a series 2 with a austin mini 10 inch wheel on it a few years back! i wouldn't like to have used on a landy, let alone my mini! i guess it eliminates free play somewhat though...
i hav a series 2 and the steering column doesnt have a threaded nut on the top but it has a pinch bolt on the steering wheel, therefore, the defender wheel will not fit a series 2, it may fit a 2a or a 3
Landrover main dealers only, bargain at £700 real fake tortioseshell and pvc leatherette, must be fitted by dealer @ £125 per hour, should'nt take more than 3 hours to fit. Kit comes complete with matching furry dice, at extra cost. Bargain!!