Hey guys/gals. I have debated on upgrading my stereo for quite some time now. I have the 2005 GTP with the Monsoon system. I am wanting to add a deck and possibly a sub with amp. Now I have heard there is a harness that will allow my Monsoon to still work, plus all my chimes and such. This harness is super expensive. I was just wondering if you guys knew of a place cheaper. Ive tried all the local audio shops. Maybe it's just expensive in Canada.