There definitely is some more activity with custom AMD Radeon X Vega boards. The next in line is PowerColor who is showing a Vega 64 based on a custom design and cooler, the Red Devil is coming at ya.

In specific, the product is the Red Devil 64 which is fitted with a proper size three fan cooling solution. As spotted, it has two sets of micro DIP switches, the one to the far left is a triple-BIOS switch. As to why three BIOSes are implemented, who knows. Perhaps a mining BIOS?
 

 
The second switch can be used to control the LED lighting for Red Devil logo (likely on/off). Judging from it, the PCB is fairly similar to the reference design (but isn't one), so I'll reserve any judgment on that for now, it seems a bit wider than 17cm though, to make room for the cooler mount. The Red Devil comes fitted with two DisplayPorts as well as two HDMI connectors.

Update November, 21: an etailer posted a photo and specs on the Radeon RX VEGA 64 DEVIL 8GB, it is slightly overclocked with a Core Clock: 1417MHz Boost Clock: 1607MHz. Availability still remains TBA, the card is available for preorder at 590 GBP, which in today's ironic exchange rate is 666 Euro ;-)
 

There's a Dragon coming as well 

We confirmed with PowerColor that a custom RX Vega 56 Red Devil is also in the works as well as a Red Dragon version. The Red Dragon version will likely be the more value proposition and gets a dual-fan cooler, opposed to the triple fan solution of the Red Devil.

The Red Devil series will become available in the next few weeks. Anyone fancy a Devil?