Happened upon this place at random while looking for some Arms Micron pictures. They've got Japanese Prime Breakdown, Vehicon and Jet Vehicon (which I grabbed) and a bunch of others in stock, for what seem fairly reasonable prices.

Obviously I've only just ordered them, so we'll see how long they take to rock up, but may be worth a go for those of us looking for those harder-to-find items.

https://plamoya.com/