Timing chain cover leak

Hi, I have a large oil leak on my car listed above diesel. As I understand it it’s a timing chain. The chain has started to rattle so I have stopped driving it as I was driving it small distances and topping up the oil. When I did top up the oil the rattling stopped. There is no loss in power and it all feels fine. Just the leak. My question is can I just get the timing cover re gasket or resealed? Rather than the more expensive version of getting the whole timing chain system replaced which I’d rather not do if I can avoid it. Thanks in advance for any help you can offer.