At Aliexpress you can get the headphones for CHF 2.- (S/M/L). Just search for "replacement memory foam ear tips Sony WF-1000XM5". I've had my replacement earplugs in for 4 months and have no problems with them, the quality is right and the price is right too (compared to the original replacement earplugs, some of which are on sale at Digitec/Galaxus for CHF 50 (!) per pair...).

I'm just going to ask, do you still need them? Because I would need size S, the orange-coloured ones. I'm happy to supply size L. Best regards

I also need a replacement... Where can I get the size M?