bike bag

anyone knows where to buy, online, a big bike sack???? the common ones are not big enough as you have to dismantle everything on the bike, even the pannier carrier. I saw one by Deuter measuring 150, but apparently they are not doing them any more.
thanks
L

Do you know these already? :

140 l: http://www.ortlieb.de/_prod.php?lang=en&produkt=bigzip#
130 l: http://www.ortlieb.de/_prod.php?lang=en&produkt=x-tremer-xxl#

Krissi

Thanks a lot Krissi.
I have found one in New Zealand. Hope it gets here some time. Expensive but I guess it is worth it.
L