Litestream is just the replication layer, it works with any S3 compatible storage, and all of these in their guide as well https://litestream.io/guides/#replica-guides
>> I have wasted a significant chunk of my life counting out small numbers of parts into bags and posting them to people.
So, small parts like this are always counted by weight, and I'm wondering why you would spend so much time on a counting solution when "buy a scale" is right there.