HOW TO USE:

With ME3 Coalesced Utility, add the following (in biogame.ini: sfxgame.sfxplayercustomization):
Under armappearances:
(Id=77,Name=813578,Description=813579,PlotFlag=-1,Type=CustomizableType_Arms)

Under legappearances:
(Id=77,Name=813578,Description=813579,PlotFlag=-1,Type=CustomizableType_Legs)

Under helmet appearances (if you want to use the helmet):
(Mesh=(Male="BIOG_HMM_SHP_FBD_R_DLC.FBDj.HMM_HGR_FBDj_MDL",Female="BIOG_HMF_SHP_FBD_R_DLC.FBDj.HMF_HGR_FBDj_MDL",bHasBreather=True,bHideHead=True,bHideHair=True),Id=77,Name=813578,Description=813579,PlotFlag=-1,Type=CustomizableType_Helmet)

Under shoulderappearances:
(Id=77,Name=813578,Description=813579,PlotFlag=-1,Type=CustomizableType_Shoulders)

And finally this under torsoappearances (just add three of these, use the strings I posted before):
(Mesh=(Male="BIOG_HMM_SHP_FBD_R_DLC.FBDj.HMM_SHP_FBDj_NH_MDL",Female="BIOG_HMF_SHP_FBD_R_DLC.FBDj.HMF_SHP_FBDj_NH_MDL"),GameEffects=("SFXGameContentDLC_EXP_Pack003.SFXGameEffect_UniqueArmor_Phantom"),Id=77,PlotFlag=-1,Type=CustomizableType_Torso,Name=813578,Description=813579)

Once you have added those you just need to select the blank pieces from armour locker and then select the spirit for chest. Copy those first to text editor and make sure that they do not have line breaks. It should have correct stats (though it doesn't seem to show them correctly for some reason in this case). But you can add any bonuses you want, like GameEffects=("SFXGameContent.SFXGameEffect_PartBasedArmor_HealthBonus","SFXGameContent.SFXGameEffect_PartBasedArmor_AmmoCapacityBonus") for health and ammo bonus for example, you can see what kind of other stuff is there from the other pieces and copy them.

Example:
GameEffects=("bonus1","bonus2","bonus3") and so on. So
GameEffects=("SFXGameContent.SFXGameEffect_PartBasedArmor_HealthBonus","SFXGameContent.SFXGameEffect_PartBasedArmor_AmmoCapacityBonus","SFXGameContent.SFXGameEffect_PartBasedArmor_WeaponDamageBonus")
would give health, ammo and weapon damage boost.

You can add them to blank pieces too if you want but they will stack and quickly make you over powerful. For arms:
(Id=77,Name=813578,Description=813579,PlotFlag=-1,GameEffects=("SFXGameContent.SFXGameEffect_PartBasedArmor_HealthBonus","SFXGameContent.SFXGameEffect_PartBasedArmor_AmmoCapacityBonus","SFXGameContent.SFXGameEffect_PartBasedArmor_WeaponDamageBonus"),Type=CustomizableType_Arms)