Hello,
take a look at this page, my pseudonym is Deleeh.
I described everything there.
Back then I bought the headphones cheaply on Ebay, the original pads were no longer on them.
I then bought some that was also suggested in this forum.
The Ahg Pads.
https://forum.hifiguides.com/t/drop-discontinuing-fostex-tr-x00-line/6178/718