Thanks again to all! Lots of good info...who would'a thought the key has had so many variations!
Steve, the last 2 I bought have the dog-bone shape to the handle, but I can't remember where I bought them. The most recent I bought was an Ebay for an "original" key, but it is different than all the pics above. The handle is straight, but it slips into a hole in the main shaft.
Now that I know what to look for, I'm sure something will turn up on Ebay eventually. Until then, if you do happen to find one...I'd gladly pay for you time and cost though!