Does anybody know where I can find...

[Rob Farmer]

An ignition switch locking nut?

its the chrome locking ring that secures the lock. I didn't want to buy a whole ignition switch just to get a lock ring. Doesn't have to be nurled like this one.

 

[Steve R]

It's over 24 hours since your post. Just wanted to say I feel your pain.

 

[r100gser]

these might be worth a try
http://www.stein-dinse.biz/index.php