There are some Cartel Market gear that include the mods but not at end-game level. The majority of all the Cartel Market Gear are just empty shells for the appearance, but for the armor they are adaptive (does not matter if you are light/medium/heavy, the armor protection scales to what your class uses).
The only way to get the gear configured for end-game pvp or pve, is to earn the actual pvp/pve gear through commendation purchases, loots in flashpoints/ops, or crafted item modifications. You can strip them out of the original pieces and move to your Cartel Gear.