Finding a reputable source for Internet Explorer 11 nowadays is almost as challenging as getting someone to admit they still spend it! Jokes aside, your best bet for a safe download would be to check Microsoft’s official website or their software catalog. They often keep legacy versions available for just this type of situation. Just ensure you’re on the genuine Microsoft site to avoid any fishy downloads!
Always remember, navigating the web with IE these days is like riding a bike... except the bike is on fire, and you're in hell!