Spencer Fatman Steering Wheel

[Ratatat]

City

Citrus Heights

State

Calif

I recently acquired a Spencer Fatman steering wheel. Nice wheel but I am missing the key. Does anybody know of where I might get a key for it, a blank so it can be cut to the lock. Been to a couple of locksmiths but no luck. I just need a blank that will fit the lock.
Thanks in advance for any help,
Brandon