I know you can switch the screen assembly from high-resolution matte to high resolution glossy, but can you go from low-resolution glossy to high resolution?

Specifically, if I get a 15" 2012 MBP and take it to an Apple Authorized Service Provider (AASP), can they upgrade a low-resolution glossy to high-resolution (non retina) glossy screen?

I purchased a 2012 MBP with the anti-glare, but I'd really rather have the glossy. So, it seems silly to pay more for a higher resolution screen and then just turn around and get it switched over at an AASP when I could just return the one I purchased and wait for one like I have but with a lower resolution screen.