Higher efficiency window unit?

[oil pan 4]

I am looking for a big 18,000btu 220v powered window unit that has a SEER rating greater than 12.
Are there any window units out there higher than 12?

I'm finding big window A/C units that have dreadfully low SEER ratings of like 9, 10 and barely over 11.

Even the cheapest non inverter split unit I can find has a SEER of around 15.

I may have to do a creative through the garage split install with condensation pump if I can't find a decent window unit.