My parents bought a log cabin that dates to the 1960’s. As it turns out, they have had termites in an interior wall. They would like to repair it. It has a tongue and groove system on the top and bottom. They in live near Canton,IL. He said that they are 6”’ or 7” counting the tongue. Yellow pine is what he thinks they are. He needs the equivalent of (7) 12 foot long logs. I would appreciate your response. Thank you very much,Jeffrey LeRoy.