I'm needing to export high-resolution graphics from Excel, charts from my
data for professional publication at 600 dpi.

I used to be able to copy-paste Office graphs as vector graphics into
Photoshop or Illustrator (my preferred platforms for final finishing on
graphics).

However, the Chart app in Office 2007 seems to dump low-resolution rasters
into anything that's not Office.

Powerpoint, Word, nor any other Microsoft product I've encountered are
acceptable substitutes.

Any ideas on how to get Office to export charts as high-resolution vectors?