I still don't understand this.

Even E35K has access to all unsold economy seats.

Which means OP has no status (or maybe P25K). So why the heck would AC do anything?

If I were to email the AC RM, I would make the argument that I'm SE, I've hit the AQD requirement, and I'd really like some X space on a certain flight, if the loads are such that they don't think it will sell out.

But see how that starts with "I'm a customer who gives you lots of money", and asks for a seat if they don't think they can sell it?

It's at least remotely plausible I could get it opened up.