10 years ago, I vaguely remember the price for a new steering box/column unit from Nissan ZA was about 15%-25% the cost of a new 1200. Was in the range of $1000 (+freight,gst,duty).
They also offered rebuilding service... can't remember the details on that.

That's not as much money to me these days, but it's still significant. If I could source a new steering box for less than $500 I'd say I'd be interested.