Screen caster needed

Hello I need a English speaker person who is skilled in preparing screen cast for me using his own voice-over but it should be in American, British or Australian accent most preferably. This screen cast needs to be 12 mins long. Please share your screen casting samples in your own voices preferably. P.S. I want to stick to at max 100-200 budget. I will be giving a pdf with all details of the software and you need to just screencast it with your voiceover delivered with basic callouts and zoom-in within camtasia.