WANTED Mammut RAS 2.0 Compatible Rucksack

It's a long shot..... I'm looking for a Mammut RAS 2.0 compatible rucksack around 25 litres or smaller.

I have a 35 litre sack which is fine for longer tours, however looking for something smaller for day use.

I have the airbag systen so it's just the sack I need if anyone has one gathering dust somewhere.

Thanks in advance,

Simon