We have an older single wide mobile home, built in 1972, with a built in hearth. The stove was removed before we purchased it. The chimney pipe is ancient Amerivent 6 FB which has an outer diameter of 9 inches. We pulled that. The roof jack is too large in circumference for the 6 inch chimney pipe we need for the stove. We bought a VC Aspen C3. We just had the roof sealed so we aren't wanting to have to replace the roof jack. Options?? Thanks so much!