Not with the manner by which each Omega Protectorate soldier is identified with. Blame Cira's paranoia after Clockwork Rebellion, sith antics, and numerous assassination attempts.
Maramere is a planet with remnants of a WMD.... it is on high lock down because of efforts to ensure proper disposal and destruction of the items. Add to that the stiygium crystals... yeahh...
The odds of you being able to "pretend" to be Omega Protectorate soldiers on such a planet are low. You can probably be able to do it for a little bit, but then alarms will start ringing.
And then if we catch you, we'll be wondering why a CIS agent, a Jedi Knight, and who ever else came in trying to steal our stygium. International conflicts ensue.
Not saying it can't be done, but you will be having heavy opposition on our end if you attempt to steal.