Email this dude: brad.mullins0681@gmail.com
They are $10 each + $5 shipping.
Here is his instragram:
https://instagram.com/brads_caps/
Awesome! Thanks for that. I am about to hit him up right now. I am going to get 1 of these for my v1 Derringer and use the Bambino cap I have on the way for my v1.2. Hopefully I will still use the 2 Derringers when my Bambino atties come in.