Still not official, but
Spansh might be what you're looking for.
Yes indeed, and if it's a dump of "all" systems the OP is after, Spansh is the better option right now from what I can see. (But
@yasto - do be aware that all of the community data is incomplete, because not all players run helper apps which share their data to e.g. EDDN.)
I recently checked the Spansh and EDSM system dump files, and the Spansh dump had roughly twice as many systems in it (~150M), which puzzled me because I had expected them to be pretty close to identical.
Are there any other independent sources of system data available as dumps?