Simply rebinding the existing package will not help you resolve -805. I think that resolving -805 is a slightly eloborate process and it simply cannot be done by wiriting SQL procedure( which you have outlined).
In fact Tools like Platinum detector or BMC Apptune are available which take you step by step to resolve -805. Even if these tools are not supported in your installation, you have to query a series of Db2 catlog tables and then do a bind.
If you want to try writing a stored procedure, notwithstanding the elaborate processes that i mentioned above, you can try writing a REXX stored procedure instead of an SQL procedure.