O.K. As I seem to be the only one in the world, who will front up with the info.
I will do so, but Kevin,

as you buy up Canada's stock of carrier bits, you are expected to help me find a good canadian steering wheel.
Here are some specs;
Eye bolt. TL12685.
Overall length 118.5mm.
Thread length 83mm.
Thread 1/2" BSF.
Eye O.D. 25.4mm.
Eye I.D. 13mm.
Hull bracket TL 12649. (FMCo 41)
Length 78mm.
Cut from 1.0 x 1 1/2" (25.4 x 38 x 5) unequal angle. (thats 5mm thick)
The holes are 10mm dia. at 2.0" (51mm) centers.
The Spring. It has F.M.Co T.L.6xxx-xx in one hook (x = undecipherable)
Wire dia. 5mm.
spring length 260mm. (not including the hooks)
effective length. 300mm. (to inside of both hooks)
Hook wire dia. 7.5mm.
dia. of spring. 25.4mm.
hook circle. 28.mm. (its not exactly a circle the end is straight.
In case its not obvious, the hooks are separate pieces.
If you dont have a spare steering wheel, and you need more info, feel free to ask. I'll let you know if I think its a dumb question. (there aren't any dumb questions)
Except maybe this one. Richard, Where might I be expected to go to get a 3D scan done? (If I was in the U.K, i'd go to Ben)
Photos to follow.