Sadly there is very much a chance we won't find a trading partner
Consider the constraints:
-Romo won't agree to go to any team that isn't a contender...
-Many teams are happy with their quarterback
-A trading partner would need ample free salary space and the willingness to use it
-A trading partner would need to be motivated for immediate results and be ok with a brief window
-A trading partner would need to take on considerable risks with Romo's age and injury history
And if there aren't TWO suitors for a trade...the Cowboys have zero leverage. The team that wants him may just wait for him to get cut.
Sam Bradford has an injury history like Romo, and he drew a 1st rounder. Nick Foles, Aaron Brooks, Mark Brunell, Matt Flynn, Matt Hasselback....
Teams that are ready to win now buy simply need a QB will overpay. Their window is too small to wait on a QB to develop.
There will be multiple suitors. Denver, Arizona, NY Jets, Minnesota, Chicago, Buffalo, Jacksonville, maybe even Houston.
But don't write him off here yet. Unless Dak takes this team deep into the playoffs and plays well to the end, there will be a lingering question. They have forever with Dak still.