Thanks for the replies,
Moley, yes you are thinking of the right kit, 2 buckets (one with a hole in the middle) and some powders.
Titch, those bags look exactly like the one I remember but are they appear shallower than the one my sister's partner has (had).
Even if I don't manage to get hold of one I'll certainly be keeping the buckets, I normally wait for the wine to clear naturally
and then rack off into a clean demi. But as I've been given most of a filter kit I thought I might use it a couple of time and then go back to the normal method. There was also an old boots filter in the box, I think that might get a bit more use as you can still get the papers for those.
Thanks,
Alan