A mod that displays horizontal surface velocity as seperate lateral components?

[RoboRay]

I'm looking for a mod that provides something similar to Left/Right and Forward/Back indicators on this:

Normally, you can read this information from the NavBall. However, when making a vertical landing with a horizontally-oriented (airplane-style) cockpit, you can't see the prograde/retrograde markers because they're at the top of the ball and you're looking at the side. Being able to see your lateral and longitudinal drift rates would make IVA-only landings a lot easier. The Apollo LEM had something like this, showing two crossed lines that could be centered to zero out the horizontal velocity, but I'm having trouble finding a good picture of it.

Does anyone know of an existing mod that adds a UI window or IVA prop that does this? I'm pretty sure RPM can do this, but I'd rather not recreate the wheel if someone has already done it, especially considering I currently know next to nothing about RPM and IVA development.

Edited August 20, 2015 by RoboRay