Robin Johnson's Economics Webpage has moved to http://homepages.paradise.net.nz/johnso14.
Robin Johnson's old Webpage at Geocities is no longer there, as Yahoo withdew the free home page service.
I have just uploaded a SVG version to Wikimedia Commons. On that page there is a link to the data source on Robbie Andrew's website and the background to the data and it's use in a publication.
The scaled vector graphic looks like this when the suggested template from Wikimedia is used.
And I have uploaded the R script I wrote to Google Drive. And here it is below via a Github Gist.