You mean signatures right? Just checking before I answer xD
If that's what your talking about then here's a tool which will make you one quick and easily... http://www.qrcrossing.com/siggen/
otherwise you have to use programs like photoshop :3
For mine I use photoshop and fireworks, but you can pay people on here for TBT bells or real AC bells in the TBT Marketplace to make them for you, and the people here are amazing at them♥