Add space around exported selection

[Checkmate]

I think a really handy option for the 'export' dialogue would be 'Space around image'.

 

I regularly send logo proofs to customers as JPEG or PNG. When exporting selections, the resulting image always perfectly frames the objects selected (which is good). However sometimes I like to add a border to make the image more easily viewable to the client.

 

Could there be an option to add a certain number of pixels evenly around an exported bitmap? I don't always want to adjust the artboard or add another object to achieve this.