skinny

Hi everyone, i'm new here and need some help ASAP. I came here 9 months ago as a skilled mechanic on a 457 visa however i have fallen out of love with the job and want to do something different. I have been offered several jobs in sales but they wont touch me as my visa is for a mechanic. My question is is there anyway i can transfer from my current job to another on a 457 visa. Please help as my wife and i will have to move back to the UK and that is not what either of us want. Please help guys.:arghh: