looking for wire harnest

I own a 2006 Mitsubishi Eclipse and i was looking at installing an aftermarket head unit.  i found a wire harnest but i talked to alot of people and they said that if you get one you will have to rewire some of your speakers and sub, but the other day i went to circut city and they said there was a special wire harnest out that you could get and it would allow you to keep all of your parts.  does any one have any idea where i might be able to find this?

it is through metra and i believe scosche would have one too but the metra number is 70-7003 you can get them at your local frys electronics or  best buy and maybe curcuit city but would most likely be a special order  one...you can do it....

advanced MECP, lol does it really matter....

patience is a virtue

well i tried looking for the metra number you gave me and found something on amazon but it looks like the one i already have that only lets me connect the minimum things.  i went to scosche's web site and sent them an e-mail to see if they could help me find something.  thanks for the help and if i find it ill post where i got it for any one else that might look for it.

metra 70-7002 it the factory amplifier bypass harness your looking for.rtfm