I'm trying to go cheap on acquiring my stove pipe and chimney pipe through Craigslist and scored a good deal on Excel, but I need 48" more to reach the 7ft I need to meet codes for an 84 inch chimney. I can get a great deal on a Selkirk Metalbestos All Fuel Class A Chimney Pipe - 6 In. Diameter and need to know if there is an adapter I can use join the Excel and Metalbestos? Any other thoughts would be greatly appreciated.