HL2 style crosshair health/ammo indicators in TF2?

I was wondering if it was possible to enable these (or have a custom HUD with a similar feature) in TF2. since it's present in alot of other source games I was interested if it was in tf2 at all, and if it was: how to enable it (I struggle with keeping my eye on what's going on in game because I'm often looking in the corners, at my health, ammo, at chat, at the timer etc.)

(ps: sorry for the image quality. I made it while taking a painful shit at 30 past midnight)