I like the 2nd one. I'm looking to make one for my Cobra derringer, too and what you have is nearly perfect.
If I make one, I'd like to stitch 2 loops on the front to hold 2 additional shots.
I like the look of the holster, but the skirt is a bit too wide toward the muzzel end, for my liking. The spade design on the billet is great.
Does it have tie downs?