1. Jason @ ED
2. Yes the Taiwanese stuff these days is very good quality
3. Space grey is indeed a hard colour to match. Especially at the front - you've got a polyurethane bumper, plastic guards and a metal bonnet... ideally you want the whole front 'blended' where the bumper guards and bonnet gets sprayed as does part of the doors and the new bumper is indistinguishable... however this adds to the cost.
4. A straight up spraying of bumper should be $350-400 to paint and fit.