The issue I would see, using the grey oak, or any existing material used currently, is that we lose a little of the individuality that the Forum Knife usually has. I think we should choose a cover that has not been used for an existing swayback, to help keep it "special". I know there are many other traits that will make it special, but I think the handle will perhaps be the most "defining".
Just random thoughts.... I'm certainly ok with whatever the group wants, and/or whatever Mike can negotiate.