Don't know if anyone else has got back to you but you can get IPSW files from here http://www.redmondpie.com/ios-9-download-links-for-iphone-ipad-ipod-touch-ipsw-links/ or here https://ipsw.me
Make sure your choose the one specific to your phone model.
Also, if you backup to iCloud you'll almost certainly find that your current backup will not restore to the phone if you need it to for any reason once you've put 9.0.1 on it since the backup will be 9.1. It's possible the phone will just make another one but to save space I deleted my iCloud backup once I was sure the phone was working and forced the phone to "backup now"
But, and I can't stress this enough, make an encrypted backup to your computer first in case anything goes wrong. Encrypted so it will backup things like health data and wifi passwords etc.
what does your tracking say now is it still in ryton? mine is going to middleton like yours but its still in ryton