Hello all, new to the forum. Getting ready to install different wood stove and upgrade wall pass through to exterior chimney. Chimney has 12” x 8” terra cotta liner. Currently has 8” crock passing through wall but does not have sufficient clearance and I can see charred wood inside the wall from previous use. (From previous owner(s). Looking for an insulated thimble to pass through wall that will fit into the 8” hole in the chimney liner and accept 8” stove pipe from stove. I have attached pics of what I am working with as well as an e ample of what I think I need for a thimble? Any thimble suggestions appreciated. We are tearing the interior wall out so will be able to frame in whatever we need and access hole in liner fairly well. Thanks in advance!