Cannot download "enwiki_core"

[Hannah123567]

Very insightful packages and explanation, thanks a lot!

Now I encountered a problem. The spikex provides wikigraphs ready to be used, including enwiki_core, simplewiki_core, and itwiki_core.
However, it seems that the website that stores these packages has gone (404 not found) so that we can not download "enwiki_core". How can I access to the wikigraph package (i.e., enwiki_core) at this moment?
I would be very grateful if someone could help me download these packages.