I'm certain they will be made available by crafting. Or at least the larger version will be.

My guess will be that Treated Camphorwood Lumber will be the main ingredient. Other ones would probably be Camphor and maybe some kind of metal?
I'm guessing the esoteric (soon to be lore) bought ingredients will be important.

Some ingredients to make the glass will likely be necessary. Probably simply Clear Glass Lens.
And I am guessing at least one materia from unspoiled nodes pre-heavensward.