I have no idea what MX is but maybe you could just compile your own? It’s not that hard. If you’re going to wipe the system anyway, it’s an opportunity to mess around a little and learn
Just remember to
backup old kernel AND initrd
have a rescue usb in case it completely stops booting up
choose modules that are used for your hard drive and filesystem as built into the kernel, just in case
you should be able to copy the CONFIG of the old kernel in the repo and use it (as the wiki proposes)