This one of the great R2R multibit dacs, that does justice to Redbook .
16 x PCM63P-K – SM5842AP
I'd buy it off you if you were in Australia.
Or you'll have to purchase an old cdp on ebay to get hold of a PCM-63 chip if one of them is playing up.
Here is a list of cheaper players that used them, there are many many more very expensive ones, but just get a cheap one for the part.
Monarchy Audio Model 22, 22A, 22B, 22C, 24 and 33
Parasound 1500 and 1600
Pioneer PD73, PD93