[colanm]

I have a pair of these excellent headphones but the ear buds have become detached and are lost.
Can anybody tell me where I might get replacements?

[wicker_man]

I would suggest trying Compy foam tips to replace the standard silicone tips/buds.

I recently got some for my Denon C551's and find they give a much better fit, and are also more comfortable. A bit pricey, but worth it in my opinion (I paid around £23 for 5 pairs). The size you need is T400.

Alternately, you can use any tips designed to fit the Sennheiser CX300/400/500, Sony MDR-EX51/71, Ultimate Ears Metro.fi and V-Moda Vibe earphones, because they all use the same size fitting.