There's no such thing as a cheat database for a certain firmware; they can be used on any lcfw or cfw you have. Rather than looking for a database, it's much easier to look for the game(s) that you want the cheat for.
Just replace the cheat database file in your root:\seplugins\(tempar or cwcheat or whichever you use)
to add cheats to cwcheat, open the cheat.db file in notepad or any other word processor and just add the cheat code under the correct game.
I'm not sure about tempar. Maybe somebody else can enlighten you on this.