Ok, I just finished measuring and calcutating the possibilities in my fabric, and if I make a 1" light border around the piano keys, hoping it doesn't show too much that it's a different fabric, I have just enough of the dark brown to make a 3.5" border. It's still less that I wanted, but my only other option is to go and buy more of that brown. The store is only 3 minutes away, and I get an employee discound, but I REALLY don't feel like going back there, plus I just went and spent 25 bucks there yesterday. I think I might just suck it up, and leave it at 3.5" border.
I'll buy a brown fitted sheet to cover my box spring, so it matches my bed frame.