Gail,
That's a nice cabinet. I need one like that too for my 66-1.
Anyway, you'd need the pedal and the pitman arm to make it complete. They are out there, but not common. I returned a treadle base back to treadle last year and had to search all over the world for the parts. I got the big wheel, pedal, and other small bits from a member of another forum, the pitman arm came from Australia, and so forth.
I've since seen some parts on eBay. So you might have better luck than I did.
Wish that cabinet was here, or at least closer.
And I'd really try to talk them down about 20.00.
Joe