Are the ancient sun3 archives still available?

Long ago, in a time far, far away, a fellow I met on the net,
Heiko Krupp was his name, if I am remembering correctly,
had an extensive sun3 archive of software and information.
I see lots of references to it in the search engines, but I am
unable to get a live system hit on it, as if the machine does
not currently exist.  Does anyone know if those archives are
still extant, and if so, where?  Any pointers thereto are greatly
appreciated.

Thanks

Bob Keys