McCreed, you're right. Tru-oil is imported down here and it is a bit expensive. I've seen some local luthiers sharing recipes for "homemade tru-oil", but poly might be less risky.
I'll also try to read up on finishing with Carnauba Wax. I always have a can of that stuff around that I use to touch up the furniture every now and then, but I didn't realize it was a finishing option. I'll try to find out how well it withstands the playing...