Hi, I bought a house that was built in 1974 and needs to have the foundation vents replaced as they are falling apart and allow rodents in underneath the house in the crawl space. What the vents currently are now is made of wood and I'm guessing some form of metal mesh. They aren't a "traditional" size. They measure 2 feet long by 9 inches wide and 6 inches deep. Before I just rip out the old and put in new, I'm wondering what the best possible replacement might be. Thanks!