There's an easy cheap fix guys. Had exactly the same issue and did what I always do for all my D1 parts.
Go to eBay - The UK's Online Marketplace and pick up a second hand replacement unit. Easy enough to fit. Pop off the logo from the steering wheel, undo the one nut. Be careful not to smack yourself in the head when pulling off the steering wheel. ;)
Then a couple of screws and two plugs later you are cooking with gas. Re-assemble and enjoy.
Total cost inc shipping was around $40.
Good luck with it.
Regards
Martin

