Because of my chimney configuration,I am going to need a 45 degree elbow in order to get a flex liner from the flue opening in the fire box to the insert's outlet. I have looked for a combination elbow and appliance adapter without success. Is there such a thing? Anyone have a link to an online store selling this? However it needs to be done, I need to keep the configuration as short as possible as space is limited. Hope that makes sense. Thanks, Mike