I believe this is what you are looking for,
http://www.ozbrew.com/default.asp?menuI=1&catI=2&catS=18&CatSs=63&country=Australia&specs=true&zoom=261
the above seal will work if you just wanted to replace that single seal.
There are seal kits for the EK, Downey, Andale
I think the seal kits...