First of all, where are you located? This might help in finding what’s available regionally.
If you see this kind of material on a lot of product (i.e. a subdivision with a somewhat common design or style) then it should be readily available in your area… provided your photo was taken near you.
While I don’t work in this kind of stuff, it looks to me like it’s a cementious / concrete tile.
MonierLifetile Madera Mountainwood, available in all MonierLifetile Regions.
Try monierlifetile.com to see if they have what you’re looking for.
If you’re building a house, I’d also suggest you try to bypass your contractor / builder & go directly to a roofer. It will save you some $$ & allow you to get into a one on one with the contractor in design & quality standards. The one thing YOU will have to do is make the scheduling arrangements that the contractor normally would do (i.e. roofer before the stone mason or after painters or before siding people depending on what your design standards call for.
Oh, & make sure the plumbers & HVAC people are in the picture ahead of time as well to get the roof penetrations taken care of @ the earliest time possible. It will save you from spending $$ by getting a repeat trip from the roofer to fix or modify penetrations these other people might make through the roof.