Really?
There's a heap of coaching assistants and apprentices, not to mention ex-coaches who could be good for them (or current coaches who might be lured away...):

Ex's & current coaches:
- Paul Roos (wouldn't be my choice but everyone else seems to think he is awesome and gettable...)
- Clarkson
- Brad Scott
- Ratten (hehe...)
- Michael Voss
- Matthew Knights
- Brenton Sanderson (current assistant at Coll)
- Guy McKenna
- Brendan McCartney

Current assistants:
- Scott Burns (current assistant at Coll)
- Simon Lloyd
- John Barker
- Nathan Bassett
- Stuart Dew

And that's only those I know about... I didn't really know about Don Pyke, Chris Fagan nor Luke Beveridge when he was appointed.

Of those, I reckon the initial favourites would be, assuming Clarkson is not available:
- Roos - unlikely (why spoil a great reputation...?)
- Burns
- Dew
- Brad Scott
- Caracella