Follow up question on "growing a SAN Volume"

I would find the ability to dynamically grow a filesystem mounted on a
SAN volume very useful.  A previous post lists the following as the way
to do this:

- showfdmn domain-name (gives me the dskX)
- Extend the volume on the SAN storage (EVA)
- hwmgr scan scsi
- disklabel -rd dskX
- mount -u -o extend domain-name#files /mountpoint

When I try the mount command I get the following error:
WARNING: -o extend option ignored.
This option requires the AdvFS advanced utilities license.

Does anyone know the approximate cost of the AdvFS advanced utilities
license, or if it is free where I could get it?  Is there a way to do
the same thing without AdvFS advanced utilities license?  

Tige Vollrath
[email protected]