I have tried to order 404 from a dozen websites. All of them cancelled 5e order and refunded my money. Finally, one site checked with West Systems and found out that they are no longer going to make it.
Guess what? 404 is back! I was in a West Marine store the other day and they had it on the shelf again! I don't know if they still had stock or if the company shipped them more product. But I bought some immediately!