Someone at Asmodee dropped the ball big time with this expansion. In Canada it was available in stores for a brief blip and sold out quickly in the later part of 2015. A year later and a reprint is still not available. (It's in the 'In production' phase on their website.) Eclipse has been in the top 10 or 20 list of games on bgg for years. This expansion should have been given more priority than it has in North America.
I too missed out on the 2 or 3 week window when this expansion was available in Canada in 2015. Have been looking for it ever since. Oh well. Asmodee's loss.