Rick,
The date code on that derringer (XVII) indicates it was made in 1961. They have not been made in a very long time. Once in a blue moon you will find one on the gun auction sites. I had this one customized by having the barrel stripped, engraved, then charcoal blued. Then I carved the ivory grips and installed them. I should send the trigger, hammer, and barrel release out to be charcoal blued as well. If I find another on line, I will probably buy it. I have not been too anxious to shoot this one after I had it all dressed up.
OT
Back when the derringer issue was up for a vote, I did quite a bit of research on the background of these replicas. To help in your hunt:
Uberti initially offered these in the '60's and the model was called a "Maverick" derringer. They were sold concurrently as Uberti's C. Sharps Pepperbox replicas.
At some point (likely early 70's), The Tooling was sold to a California company called I.A.R. The continued to offer the same derringer, but the maker's stamp says "I.A.R., San Juan Cap." and "Made in USA".
So the key words for your search are "I.A.R." "Uberti" and "Maverick".
Of all the replica's I reviewed, these Uberti guns were the prettiest. The Uberti ones came blued and with case hardened parts. A real jem if you can find one.