PPG makes a "flat & flexed" https://buyat.ppg.com/refinishProduc...c-82a4b30ed13f clear that would give you a satin finish while retaining flexibilty on plastic. Dunno if it's compatable with the factory finish butn it would be pretty cool to do a custom matte finish without waiting for the factory version that may or not be available to you. I'm guessing your dealer already ordered their allocation long ago and doesn't have a matte coming in.
Well gents, it had better be coming stateside as the dealer took a deposit off me today. I'll let you lot know delivery estimates on Tuesday. Is it wrong that I've already started ordering bits for it?