Hi there! There were three pink Discos left when I purchased mine from Selfridges.com and they sold out very fast. Pink color also sold out quite fast from net-a-porter few weeks ago. I hesitated then but regretted it afterwards. I am not sure if Selfridges and net-a-porter had the same shade of pink, though. On the NAP site the shade was called 'powder' and on the Selfridges it is called 'dark cipria'.
Keep checking those sites regularly. There might be new stock coming in or someone may return one. Good luck for your search! I know how frustrating it can be when you know what you want and can not find it anywhere.

Been there.