It's expensive, but it works like a charm, and it's pretty much a lifetime supply.
Did some quick testing last night and managed to drop 7 deg C by pegging my main radiator fans at 100%. Obviously not a permanent solution to high temps, but an indication that there's room for improvement with a heatsink + direct active cooling. Looks like my amazon shipment (including the stand-offs and m.2 heatsink) will be in today so I can get a couple more data points.
That's pretty good for just upping the airflow..I think this will go well.