No responses to this one yet...drat.
OK, I'll take the bullet
No can do. If you create a local copy of the data source (which you'll need to) you get the TDE payload, if one exists.
This sounds like an "Idea" to me - Adding the ability to modify/republish a Data Server data source sans the "download local copy" step.
Thanks Russell. I figured that was the answer and it's hard to believe something so simple was overlooked. It certainly not reasonable for someone to expect someone to download an extract that's incredibly large.
This is incredibly disappointing! I'll post it to the ideas though. I can't imagine this would be much work at all.
You'll have my vote!