I'm with you about the Spurgeon readings. I find them over my head quite often and have started to skip reading them.
I struggle with the Spurgeon readings, too. I have used My Utmost for His Highest by Oswald Chambers in the past. I think it is a good, classic daily devotional that is easier to follow than Spurgeon's book.
I did the 'contact us' option on the "the official web site of Oswald Chambers Publications ASSOCIATION Ltd." & got this response today:
Thank you for your email and query. Yes, Utmost is just about ready to upload on to Kindle. We try to stay up with modern gadgets.
Every blessing
Geoff Bennett
Projects Director
OCPAL