best doors to put in crawl space entrance

[Gp G.]

What are the best doors to put in crawl space entrances? There are currently 3 entrances to crawl space and 3 wooden doors. But these wooden doors and latches and frames are in bad shape. Rodents, squirrels, rats etc. entering through these door gaps. Are metal doors are better or wooden doors? Which type of contractor can help me in putting these doors? Please advise.