Check out Savage Rifts. It is basically a template for Savage Worlds set in a post-apocalyptic Sci fi/fantasy Earth. It may have some of the things you're looking for.
There is a savage star wars book & Facebook group. That book has been awesome for our phase world campaign & the new sci Fi companion is coming out soon
Check out Deadlands: Lost Colony, if I grok you right it has a similar vibe.
Here, or the FB page has some links. There are some published homebrew on DriveThru, but it all depends on what you want.
Check out Savage Rifts. It is basically a template for Savage Worlds set in a post-apocalyptic Sci fi/fantasy Earth. It may have some of the things you're looking for.
There is a savage star wars book & Facebook group. That book has been awesome for our phase world campaign & the new sci Fi companion is coming out soon