I just joined Airgun Nation and saw this thread...
I also have an HW backordered. I thought I was the only person with this issue. Krale reps told me that Weihrauch does not inform them when the next shipment will arrive - it just shows up.
Some companies will give Krale a "heads up". When I emailed a sales rep about the Snowpeak P35, they told me that Artemis and Snowpeak guns would be delivered the following month.
Basically, you have to contact Krale, periodically, if you're interested in an item. I check the Krale website, everyday, hoping that my gun will be in stock.
I know that doesn't help much...