It would be great if you could! By what you wrote I assume you didn't see this, which is a full collection up to october of last year, so it's probably less than that to only get the missing back numbersWoah. That's a new artist I've never seen before. I might start supporting them! Do you happen to have the non-BGM version of that post?
(It's like 17k yen worth of back numbers, though)