Na, it's a pretty simple circuit board to replace and as I needed it for mainly heavy vehicle electronics - 12-48VDC, it was a perfect solution.
I'd have to dig up old PCB circuits I made (could be a few days), but I used very low noise DC-DC converter, complete modules, so I knew the noise figures were the best I could get (Vicor I think, but I can check).
I had that same noise you posted, and for the very high sensitivity signal tracing (underground sensors), it was a disaster. All quite forward.