The weakest link on ML39/390S type CD transport

Correction, I mentioned silicon-oil, sorry, I'm ignorant of teflon-oil.
So I'll have to investigate this stuff. 
As for a top-loader, when you look up my system, you'll see there is too little place/space to use one. 
M. 🇿🇦 

Update,
I have my dealer contact Harman to find out if they still have this spare part. 

That thing is smaller and lighter than a postage stamp.
Most probably costing a small fortune - if they still have it...
Somehow I do find this disturbing, building a 'bullet-prove' unit with such a fragile part at the most used mechanical interface! 

As for 'silicon-oil'... I'm very weary to follow this suggestion.
Why? The property of this stuff is marvelous - solong it will not 'creap' into any electronic components, where it creates nasty contact issues. 

I know, as I worked in cradle-relay assembly way back then, were this stuff was to be avoided like poison! 

Meanwhile I now put ½ a drop of SME supplied tt spindle oil on each guide rod - and using clear (Patex) contact glue to stick this broken plastic spider-washer together. 

Presently my fix seems to work.
For how long is written on another page. 

Thanks for your suggestions, 
M. 🇿🇦 

Try teflon oil.
After dealing with broken and slow drawer mechanisms I'm enjoying a top loader.
I attached a Herbie's Back Hole to the puck and it sounds great.

There are probably landfills full of them.  Perhaps you can get the part from someone’s broken one.  Look on flea bay.