A way to recover messages from iMessages store in iCloud trial?

I inadvertently got some imporant iMessages on a phone we use for development that was on the iOS 11 beta trial. I recall the store in iCloud message and went along with it not realizing that delting messages on one device delted it across all devices. I'm now missing a few pieces of information I could really use. As I have no backup with this (and would overwirte some current things I need anyway). Is anyone aware of what actually was going on during that trial and/or any magic bullet here?