Small Form-Factor CD Player/Transport

You could find a used Parasound Z-CD.  Very compact good sounding player. I use one as transport with Mytek Liberty DAC and AQ Optilink-1 toslink. I like small stuff.  

I looked at the smaller format CD transports last year and found that they moved around a lot when ever you touched them. Inserting or removing a CD for instance. With my current setup, I can’t put weights on the units, so I ended up buying a full size CDT.

All the best.

JD

If you can find one, this is a cool little unit - Onkyo DV-SP205FX SACD player.  I think they are Japan only and will need a power transformer.  I think I paid less than $300 including the transformer for mine.  Maybe not and "audiophile" device, but it sounds great in my 2nd system and will play SACDs.

California Audio Labs (CAL) "Delta" transport.

I think there is a sea change with CD Transports brought about by their I2S data output and DACs that can accept it. If there was a universal I2S format that ensured compatibility between all transports and DACs things would be much easier. I am looking at Pro-Ject and Heed CD transports with I2S to connect to my new Holo Audio Spring 3 v2 DAC.