That's one of the problems with the internet. Like any living system, it ages and changes, with some parts dying off and disappearing while new parts appear. OldGuy hasn't been around for about 8 years now and the wayback machine looks like it stopped being able to archive his site back in 2019. https://web.archive.org/web/20191028...lines-to-a-map is the last capture of it.

I'm bumping up against the "old" category myself and soon I will die and my stuff will flywheel along for a little while after that and then it will all disappear forever. There is still a little hope in archive.org for some of the simpler stuff, but it will also disappear someday and take everything with it, just like the newsgroup archives did when Google decided it wasn't worth the not-very-much cost per year to keep that history around.