I would contact Steve Brunelle (Audiogon username: sts), the man behind Gabriel Gold and ask him to make you one of his coaxial digital cables. I have tried many digital cables and the Gabriel Gold digital cable has been the best I have used with the Perfect Wave DAC.
Out of curiosity, why did you get your Oppo modded if you are using the Perfect Wave DAC? My understanding from Dan Wright at Modwright is that mods to the Oppo are geared towards improving the analogue output of the Oppo and don't really improve it as a transport.
Out of curiosity, why did you get your Oppo modded if you are using the Perfect Wave DAC? My understanding from Dan Wright at Modwright is that mods to the Oppo are geared towards improving the analogue output of the Oppo and don't really improve it as a transport.