Before I bought my VHX last year, I asked Dakota Digital if they were working on an HDX dash for GNs. They didn't have anything in the works at that time, but apparently that's changed. They now have an HDX version available. The major improvements are the ability to change needle colors and have a much larger boost display in the center of the dash. The buttons are also integrated into the dash so no need to mount them. It is a lot more $$$ than the VHX though. Just thought I would pass this along.
Dakota Digital manufactures digital instrumentation and accessories for the automotive, motorcycle and car audio enthusiast.