Replacement Rear Shock

[hawkesi]

I just did my full bike test last September and in November bought a 2008 FZ6.  I know from the history that the rear shock was replaced with an aftermarket one that lowered the seat height (for a previous lady rider).  As a result, the bike will not easily go on it's centre stand. 


I want to put an original or other aftermarket shock on to return it to the normal ride height.


Any suggestions which shock and where to buy?


Cheers.