Being full of insatiable curiosity (like Kipling's Elephant's Child - O best beloved), I have been digging up info about the JPSL-33 slot-loading CD drive made by Stream Unlimited of Vienna. Stream Unlimited is a small company founded by a group of research engineers from Philips. To quote from their own site :
"this Philips team (now StreamUnlimited) introduced for Philips in the years 2001-2004 the first streaming audio and video products, the first MP3 players, the first hard-disc and DVD recorders, the first HDMI products and the first Wi-Fi enabled products."
They include people who also drew up the specs for the 'Red Book Audio' CD standard, so they should know what they are doing. Their CD transports are very respected in high-end circles.
They market a line called 'Blue Tiger' which, if my limited technical knowledge is correct, contains a set of modular boards - just about everything you need to construct the innards of a CD player - except for the power supply.
Might be worth taking a look at...
NVA: P50sa - SSP - A40 - LS6 - Cube2 - BMU
Digits: E-Medic ST-M PC + Volumio + AQ Jitterbug
DAC: TeraDak V4.5 Chameleon CD: Cambridge CXC
USB: Oehlbach XXL Masterclock + DH Labs Mirage
Ethernet: Silent Angel Bonn N8 + AQ Cinnamon
Cans: AQ NightHawk Carbon + MF XCAN v3