You can purchase the Tunami bulk from VHAudio.
Oyaide Tunami & Acrolink 6N-P4030PC...
I think Oyaide and Acrolink are the same company or sister companies and looking at their interesting pc cords Oyaide Tunami & Acrolink 6N-P4030PC I thought that it must be the same cables, am I right? The price is almost the same.