I've been digging around here a bit considering some frames, and stumbled on this topic. It helped me make the connection.
For the US, the WorksWell WCB-R-306 is a Van Dessel Arch65. I almost tried to order one from WorksWell, but my contact at Van Dessel gave me a sweet deal on the Arch65, so I took it. It's more than what it would be from WorksWell, but I know the brand I'm working with and have close to 10 years of experience with them, along with four of their bikes at home (Motivus Maximus LTD, two Full Tilt Boogies, and a Whiskey Tango Foxtrot) and two others have come through at various times (the original Motivus Maximus and original All Day Driver, which I raced at CrossVegas in 2016).
I did pick up an integrated bar from AirWolf since they were one of the few I could find doing a 380/120 bar/stem combo. I'll be building it up with a mix of Shimano Ultegra 8000 Di2 with GRX shifters and brakes, along with items from absoluteBLACK, Velo, Elite cages, Hunt Limitless 60 wheels, and Wahoo Speedplay pedals. Once I have everything and get it all built up, I'll add a pic.