You could still cut it into 3rds to quilt it then put it back together-- there are tutorials to show how to do this. Then you could sell or gift it to someone with a king sized bed. You might even show it off & find someone who would like to buy it, then factor in the cost of longarm quilting to send it out. I always get a 50% deposit on a sale which would more than cover the cost of the quilting, then remainder due upon completion.