In search of HUGE WOODEN BEAMS

Has anyone seen or heard of any Madereria selling wood beams that are 6 inch by 6 inch or 8 inch by 8 inch (or in between)? Need to be at least 5 METERS in length. I need five of them.
These are for outside use on a roof and I realize that being pressure treated is a dream too far but ? Cedar?
Any hints in the right direction would be appreciated. Thanks

I don't suppose you'd like to give me the name and number of your builder? Dense, heavy, long and termite resistant ticks a lot of wants for me.
I'm not saying that price is no object BUT sometimes ya gotta pay for what you need.
The second house of the three built beside me, has just put up its electric fencing. I'm starting to feel like I'm living in a concentration camp. I want to, not only obstruct that view, but also attach an awning to the beams and arrange the beams in such a way that air can enter the centre courtyard from the east and the west.

No, I don't plan on doing it myself. It's not really construction per se. Just placement in a certain order once they are on the roof.
I will go to the Madereria opposite Soriana and see if they can get the palm ones. I didn't even know such a thing existed so thank you for that. I've found a source of Vigas de Palma in Colima. You never know what's possible 'til you ask.

I already have and they didn't know about palm vigas.
I'll get what I want eventually. Everything is possible.
From my grade 7 home room teacher... "The difficult, we do at once. The impossible, takes a little longer."

Good looking beams!

I haven't gotten to the lumber place yet. That won't happen until next week. Still letting my fingers do the walking and gathering information.
I am sure Huanacastle (aka Parota) would do the trick but would be a waste for what I want it for.

I like that hardware store Wide Sky! They have nuts and bolts that I couldn't find anywhere else.