Thought I'd post this as I know there's been a shortage of panda slave cylinders 
Just fitted a TRW PJF173 to mine (2010 Active Eco), not listed as compatible but bolted straight up and works perfectly! Anything compatible with this one should in theory fit and this one also seems to be much better quality than the OE cylinder, cast body instead of plastic. Just remove the pipe from the original cylinder by popping the spring clip out, fit the new one and bleed, job done. ÂŁ35 on Amazon at the time of writing, available on prime too!
-Charles

Just fitted a TRW PJF173 to mine (2010 Active Eco), not listed as compatible but bolted straight up and works perfectly! Anything compatible with this one should in theory fit and this one also seems to be much better quality than the OE cylinder, cast body instead of plastic. Just remove the pipe from the original cylinder by popping the spring clip out, fit the new one and bleed, job done. ÂŁ35 on Amazon at the time of writing, available on prime too!
-Charles