Good news everyone !
I contacted Neill Corlett and he kindly provided a link to all his X68000 work. It has been mirrored to the FTP as well.
Mirror of X68000 software by Neill Corlett
http://nfggames.com/x68000/Mirrors/Neill%20Corlett/ (http://nfggames.com/x68000/Mirrors/Neill%20Corlett/)
Official link
http://www.neillcorlett.com/etc/x68k-sorry-for-the-downtime/ (http://www.neillcorlett.com/etc/x68k-sorry-for-the-downtime/)
Keep the scene alive !
Eidis