Strange. "mk4_hud_info.pbo" and "mk4_hud_info.pbo.mk4.bisign" is all I've got in my A3mods/@mk4_A3 folder and it's working for me.
@fhq_m4_a3 is actually a weapons mod, nothing to do with mk4 hud.
@fhq_m4_a3 is actually a weapons mod, nothing to do with mk4 hud.