G'day Lear 23,
You are correct in musing that no Lear has ever been certified for single pilot ops. Whilst in a round about way you might get it with a Citation.
That was not the point of my post however. The original post set a requirement for "pilot" not pilots. The original post also questioned B58/PA31.
In my simple way I simply trying to point the punter to the pitfalls of his and the other suggestions without slinging sand at those who had departed from the original posting.
Whilst you might say, and I'd agree, that those who would charter a Lear 23 ad hoc would probably not miss the cost of the extra crew someone in the B58 market is another kettle of fish altogether until this industry gets with the program.