Vintage Double Hose got their Argonaut wings in stock just the other week. The 35# sold out almost immediately, but it looks like the 23# and 18# are still in stock. You'll have to source a plate elsewhere; but that should be the easier part.
The VDH Argonaut 35 was the exact one I was looking at. Bryan emailed back and says he's not sure when it will be back in stock. I then went to the Deep 6 setup and they are out of both the SS plate and 30 wing. After googling around, that's when I found the Oxycheq Extreme. I'll do more research and get something ordered because I agree that I can't dive with something on backorder.....