I plan on spraying the headliner to black, cheaper than the alcantara material which after including the paint for the plastic and the adhesive, will probably cost around ~$400.
Using Dupli-Color High Performance Vinyl and Fabric Coating HVP106 to do it and some black spray paint for plastic (haven't decided which one yet. I do fear breaking the headliner clips though. Given that I heard that the sun visors are really thirsty, it will probably take 6-7 cans for an even black front to back.
Alcantara may prove to be more difficult because things like the speaker grills and the coat hook frame I believe are plastic welded into the headliner and thats just not a headache I want to deal with. Wrapping the sun visor in alcantara would be quite a time consuming endeavor as well.
I'm trying to figure out how to mask off the hazard light button so that I don't block the light in the triangle.