The ABA Tac vest's are now collectors items and pop up on ebay from time to time and usually go for about $300USD+. My suggestions is to find an airsoft replica ABA vest. As for a SPIE harness, I highly doubt that you will find one. They were made in limited quantities and distributed among a core group of soldiers. *IF* you did find a SPIE rig, you will be looking at at least $500 USD. To my knowledge, there are no replica SPIE's out there (could be wrong though)
If you kill for pleasure your a sadist.
If you kill for money you are a mercenary.
If you kill for both, you work for Blackwater.