Haven't seen this, either. I would think that it's similar to what you'd do for on-premise for a restore to the same instance. If it's a DR to another instance, I hope you have the URLs and keys stored elsewhere. I might actually look to add a job here to script the restore of the latest backup every night and keep that script on a file share.
Note, if you start to test some of this. I'd love a writeup here on what you've done, what works, and what doesn't. you don't even have to have a completely working setup to write something. I think it would be good to publish things that might not work well.