First off if you use the search function all your questions can be answered.
1. Go to the photo album and look through there, tons of Zs like that, www.zcarparts.com sells some front valences as well
2. There is no kit, all custom
3. Yes, it has been done. Search for the details
4. Nope
5. Search, lots of options like lowering springs, coil overs, etc
6. There is no better way, its what you wanna do