Replacing a part in a drawing file?

Is there any way of replacing the part referenced in a drawing file?  Much like the same way of replacing a part in an assembly.

Basically, i have done a 'save as' of a part and not had the drawing file open, now I have modified the part and lost the link to the dwg. Is there any way of re-linking it??

Thanks...

SolidworksDrawings And Detailing