Yes, disposable green 16 oz cylinders are sold everywhere. Walmart, Home Depot, and big grocery sores like Long's. Maybe Autozone. Walmart and Home Depot could also have adapters that you need. There is a chance that you will have to remove a barb fitting from you hose (where it connects to butane tank) and install a barb fitting that works with 16 oz green cylinder. I think with 13 inches height you can fit
5 lb tank, it is 12 inches tall, 8 inches diameter.
Not sure how easy is to refill it or exchange for a full tank. Most people are using 20 lb or 30 lb tanks with their RV, but occasionally I also see these 5 lb tanks.