Stupid peice of rubbish headphones

My mp3 player has a stupid 2.5mm headphone jack (the norm is 3.5mm). This means that it's somewhat difficult to find headphones that fit and are decent. I thought I had tracked some down. Alas, 'twas not to be. They have now a) broken and b) made my ear hurt. If anyone has some 2.5mm headphones or £399.99 so I can buy an iPhone, I will be eternally grateful.