Mods, delete this if you feel necessary. Just have some tips I wanted to share, on what I have done on this.
So, I have an android phone, and an app called Pocket Casts. What I have done, is download all the audios on my phone, renamed most of them, so they have better titles, and then moved them into a part of the app in storage for "Custom Episodes." They only show up in one "tile"(look at the store page and you'll understand) and everything shows up Alphabetically. You can also sort it by Date, and Title, both oldest to newest and vice versa, and oldest to newest and vice versa.
So, depending how you would name them, it would all show up in order. I first have "Destiny of Woman." Next, would be "Gospel of the Kingdom" etc. For multi part ones, I have, say "Free Will Pt 1" and "Free Will Pt 2." Do these things, and it should work out almost like I described here.
The app costs 3 or 4 dollars, but it works pretty well compared to "other" apps for podcasts. I mainly just use it for music podcasts nowadays, but having Rays audios on there helps a lot. You can even stream it to your TV and other compatible devices through Google Casting it.
If anyone needs help, I could give you some FAQ links if you need them.