It's Omnia.

Here is a link that might be useful: Omnia pocket door hardware

I have Omnia pocket door hardware, but I have the square version.
{{gwi:1509010}}

I'm not sure the pictures you took are of Omnia hardware. If you look at the first picture you posted, there is a rectangle indentation under the bolt that does not exist on the Omnia hardware. Instead, in that location is the word OMNIA. Also, the turn knob is slightly different in style. However, I will say the Omnia hardware is very nice.

Wow, almost too easy for you guys! ;)

Where's the best place to source these?

Handlesets.com has it

Here is a link that might be useful: Omnia 3910 on handlesets.com