I like the idea a peiced block border, there are many that would look good, either the flying geese already mentioned, or a border made from smaller versions of the blocks in the quilt, maybe 6 inch stars, using any star you prefer from all the same colors in the quilt, then finish a solid color border, you could add over a foot to each side that way; there is always a way to enlarge a quilt, just keep adding pretty borders...