Search for historical futures curve

Dear All,

I was wondering whether it would be possible to find a source providing a historical futures curve (for any commodity). In other words, I would be interested in following the evolution of the contango/backwardation on non financial futures.
I have done an unsucessful search on this on google.

Thanks for your inputs.

 

futuresource workstation does it.

 

Thanks grg03002. I am going to check it.