B4B I'm not certain Tucker used the same parts when your machine was made, but I wouldn't be surprised if they did.
My 1980 model uses a Char Lynn steering control valve (called an orbitrol) and a Char Lynn steering column. I'm quite sure Char Lynn supplied the steering wheels as well.
I don't know when they made the switch, but sometime after 1980 Tucker switched from a large diameter "bus sized" steering wheel to a smaller diameter wheel.
I think the current generation Tuckers still use Char Lynn components so perhaps you could get a wheel from Tucker.