Need Crank Suggestions?

I just put together a new build today and I'm running into clearance issues. The frame has a mount for a floating rear disc brake. When I attach it though, the bolt head won't clear the crank arm. It's by millimeters. The crank arm is a Raceface Atlas Am. The bottom bracket is a 68mm set up with a chainguide on one side and a single spacer on the non-drive side. I even added a second spacer just to see, it doesn't clear, so I'm in need of an extra 3mm at least. Anyone have any suggestions for a crank with slightly more frame clearance? The Raceface arm stays pretty close to the frame before bending slightly out. Maybe a Holzfeller?

Thanks for any help.