I think you'll be going digital for sure...msd makes a small 1-12 cylinder programmeable shift light that mounts right on the bars, I know you want a gauge. But all else fails, at least you can set it where you want and it'll light ya up when its time to shift.
I found a mount at pingelonline.com as well as the msd shift light. I've contemplated getting this, but am checking other options as well.