I am an expert Wikipedia editor and I have created more than 100 pages for musical artists, bands, companies, writers, small companies, lawyers, activists, actors and many more.
Dead links can be replaced with the new links, provided new links have the same information as the old one. Also, we can replace a new one if it explains the things the same way, and add additional things. But the link should not be just a trivial mention.
Send me a message, I'll go through the new links and let you know if we can use those links as a replacement for dead links. There are many ways, I'll let you know once we are in contact.