Edit: Here’s another one - this time built from the official v0.13-q tag
I haven’t flashed this one yet, but it should be at least as good as the last one 
It’s still at your own risk though!
Here’s a new build based on the v1-q branch. I have successfully flashed it and it seem to run OK, but it is essentially untested. As always, use at your own risk
Old link removed
Note that the version of microG installed does not include the Exposure Notifications API. The Exposure Notifications API can be installed from ‘Apps’, as described in this post