There have to be at least a couple of door and window places in your area . Go shopping . California has some odd codes that need to be met for many things pretty sure doors too. As for style I need to see your house and a 6' wide door is odd some my guess is you want a double door .I need more info please so p[ost a pic of the house here in a comment DO NOT start another post . If you google contemporary double doors you will see 1000s if you mean MCM by modern then google that . Ask for dealers in your area. You do not buy these things online when you live where you can easily go shopping.

This is new construction.

We are looking at double doors or pivot door.

Most local places have brochures where you can buy them from. Very limited (less than 10 doors) on display including wood, fiberglass, etc.

Provia would be the door I would look at for fiberglass. See if Golden State Lumber is near you. I know a guy that is a salesman there if necessary. I have never seen nor heard of a fiberglass pivot door being made (doesn't mean they are not). I would also rethink a double front door unless you have a very deep overhang, go with a 42" wide door and (2) sidelites.

I have a Provia window. Problems!!!!! Mold.

I would not recommend Provia anything else