There are two contradictory statements on the Revolution site which might not help matters:
"As with all our products, we will only produce enough to satisfy pre-orders so don’t miss out." http://www.revolutio...s-b-tank-wagon/
"All of our products are produced to order, but we are delighted that some model shops have also decided to stock some of our products in case you miss out on pre-ordering" http://www.revolutio...ns.com/dealers/
I'm not sure what you think is contradictory - pre-orders includes those ordered by retailers as well as direct sales. The point being that we won't produce lots of additional stock on the off-chance that someone might want to buy them in the future.