Fort Max and a most of the Headmasters (including the three coming out next week), are back in stock for pre-order... not sure if it is an increase in their order or someone has cancelled their pre-orders, but jump on the quick if you are wanting the Japanese versions, as they keep going out of stock often.
This is my search link sorted by date, which ends up having some non-Transformers items show up, so just scroll through the first two pages for the newest items.