I'd be happy to do that but I'm not sure if there are any 68k coders left in the community who would help. I only put my hand up originally because nobody else offered to give it a try.
You should use GIT/CVS/SVN if you want to receive any help. It seems Netsurf guys use GIT, you could start using it locally and then commit the changes to github for example. There's TortoiseGit if you want to do it in a comfortable/graphical way. Even if you uploaded a LHA with your changes somewhere if someone tried to help you the files would get out of sync soonish and sync-ing sources manually is a pain in the ass. Perhaps using diff correctly would solve that problem but for me GIT/SVN/CVS is the most comfortable way.
I don't promise much help but I could take a look at it and try to help from time to time (as long as we don't use ixemul).