The question is whether or not you can redirect the restore/recall of archived Enterprise Vault FSA data to a different location, and whether the source server needs to be online or not?
Well the answer is that if you use:
FSAUTILITY -t -s \\source\share -d \\dest\share
Then the source doesn't need to be online. In addition the destination doesn't need any EV services installed, it can be 'any' network share.