I have very similar feelings in regard to custom sound content. I write lots of heavy stuff that would be perfect in a game of this setting. Have you found a way to implement it? I also want to add custom zombie sound packs. I have been playing Dark Souls 3 and I heard a zombie sound in it yesterday. It must have come from the same "monster sound pack" also used by From Software.
You link to "Lost and Found" was broken. Came up as loast-and-found. Glad I changed fixed it because that was my favorite track of yours that you posted. It had the best feel for 7D2D setting in my opinion. "Behind the Block" is a great sci-fi track.
Here is my
bandcamp page. I do a ton of different style. Some heartbroken love ballads and some eat you alive tracks.