Sealey air compressor spares

I got free , but broken sealey air compressor with a welder i bought of ebay the other weekend.
Having looked at it its missing one part, being the piston and piston arm.
The compression head and motor and everything else is there in working order
Anybody know where i might get new pistion, drawn a blank on ebay sofar

its one of these but the 25ltr version

Apart from Sealey themselves, you could try some of the independant parts sellers.

This one popped up on Google

http://www.knighton-tools.co.uk/acatalog/Sealey_Spares.html

or this one

http://www.lakestools.co.uk/sealey-spares.html

machine mart?