Vishy

I've just purchased a Lexus IS250 Advance which I'm very happy with. I'm looking for a boot lip spoiler to enhance the look of the car. I have contacted my main dealer who have confirmed that they don't do one for my car and that I would need to look for an aftermarket one. The colour of my car is Celestian Black and I'm looking for a painted spoiler. Do you have any recommendations where to purchase from and what brand to buy? What other useful accessories would you recommend having?