Mills,
It sounds like the gunsmith that looked at it was not too versed in Parkers.
The safety button, and I am sure also the retainer spring, is still there evident of your photo. That means the only thing that could be "missing" is the actual safety jacket and arm that is in the stock head. These can be found every now and again and are not too difficult to put in and final fit for good operation.
The Hold open ("Parker Poker") is also a part that can be had without too much trouble and should be a near drop in fit.
I thought the gun would not cock? That might need some more exploring.
Yes, post some more pictures of the gun and lets see what you are dealing with.
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B. Dudley
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