As I said, forget it.
the runs to the front speakers are <2 ft, the power sonnectitions are all there under the dash and if you have a meter to hand are dead easy to work out.
The Suzuki loom isnt standard so replace it and you will need an adaptor for just about any radio, most have an adaptor anyway so thats 2 of then lil [!Expletive Deleted!].
Make a new loom, make it standard and use decent guage wire to stop the cutting out. This is normally caused by the wiring being so lousy that as the stereo draws current the voltage drops off.