Musical Fidelity X-Act fault - LC78835 - help!

I have a Musical Fidelity X-ACT DAC.

This uses a Sanyo LC78835 DAC chip - and it looks as though one channel has gone down on this chip. (I have a nice spiky waveform on one channel only),

I have tried to source this chip - but they appear to be unobtainable.

Does anybody have one spare by any chance?

This is a DIP device - not SMD btw.
 
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