I'm trying to see if I can lowered my ride. Is there anything that I can purchased to lower this? right now, what I did was when the car is at park, I wait until the air suspension lowered the car, then once it lowered, I turned off the air suspension. The ride height is what I wanted. But then everytime I turn the ignition, I have to reset/bypass the error message on the dash. And I'm not sure what impact would it cause long term.

Any advice will be appreciated

Not for sure what negative impact, but make sure you don't bust one of those bags, you are looking at $1000 a pop. Just like when you jack the car up, you have to turn the air ride off. I wouldn't do what you are doing if I were you.

well us guys with the Mark VIII do a sensor lowering, which makes the car think its at normal height but really its been droped 2 inchs

Your dealership can lower your nav to any height you want but you can kiss your warranty on your suspension parts good bye.