Welcome to AFM! If the car didn't come with existing fobs then it probably didn't come with that option. Any stereo shop can install a kit for you though - although unfortunately it will be more expensive than just getting a replacement fob.
My 96GT didn't come from the factory that way and I've been wanting to get it installed some time so I have that convenience as well... just something else in a long list of stuff to do lol.
Thanks for joining and keep us posted!