I ended up ordering this:
Amazon.com: Black Rubberized Hard Cover Case + LCD Screen Protector for Sprint LG Optimus S LS670: Cell Phones & Accessories
Didn't even need the car charger so I opted out for a cheaper price. Plus I looked up GT Max screen protectors on YouTube and they're glossy and non-sticky, unlike the Invisishield. Comes with a microfiber cloth for it too.