Have you tried contacting them directly?
They sold out of most of their stuff right after Christmas, then were busy making a bunch of new stuff for SHOT, they should be back from SHOT next week and have an idea of what is in stock for immediate shipment if you want to give them a call.
Both the Raider and Chief are current production models also, so if they are out of stock on the one you want, you should be able to put in a backorder for one and they will ship it as soon as it gets made.
The Website doesn't do back orders, but if you call the number up and talk to them, they can put you down for one.
The website shows a couple Raider 5 ones in stock as well.