Installed a new loo + close fit cistern some years back - special deal
from a local cheapie place, but now I know why - the flush unit leaks )-:

I've not seen anything like it before though - it does seem very efficient
at dumping a tank of water down the bowl though, but I think the rubber
seal at the bottom is perished, so it leaks.

Photo at:

http://unicorn.drogon.net/flush.jpg

The blue bit at the left (top) touches a button on the lid. Push briefly
for a full flush, push and hold for a half flush. It has a bayonet fit
on the right side (bottom) which mates with the plastic insert at the
bottom of the cistern.

Anyway, it leaks and I want a new one, or spare rubber bits for this one,
if possible, but I've not been able to find one online )-:

I think it's "Torbeck", but can't find anything exactly like what I
have online. I'm fairly sure the fill unit is Torbeck, and that's
mostly OK, it's just the flush unit that's the PITA...

So any clues as to it's origin would be appreciated!

Thanks,

Gordon