Start a new game *ofline* and as soon as it starts press start and go to online, chose Invite only session.
First you get your banshee out the garage and drive to LSC, park it in the yellow striped zone next to the opening door, and press start, options and set spawn location to last location.
Now get out of your car and just grab a random car that does have the option to taint the windows.
Drive that car into LSC, go to the menu to buy the tained roof and highlight Limo taint for windows, but don't buy it.
Now you leave it highlighted, press start, tap right all the way and go into the Playstation store for the cash cards and press X to go to the store. 'same on xbox'
Wait untill the store is fully loaded. Now press the PS button on your controller, go to your account and log out.
Single player/ofline will load into a new game, now log in again, and again press start, start invite only session and you should spawn in or near your banshee.
Now just drive the banshee into LSC
And it should teleport you a few feet in and the menu to chose the tainted glass should be open, and you can buy it.
You can also insure the Ratloader and clean rebbel with this trick if you keep the insure/put a tracker on menu open at LSC... however asap as you leave LSC it will delete the tracker and insurance.