As part of a different project, I’ve built a new APSync for the Raspberry Pi. It’s based on the latest Raspian “Buster”, so should work with all models of the Raspberry Pi.
There’s a few minor issues (see here, plus there’s no DFLogger), but mostly works very well.
My build scripts are over at Github, for those that want to build it themselves.
The disk image can be downloaded from https://rpanion.com/software/