thats very true and i agree, it does look like crap, but the fact that the 3rd brake light is on the wing and with inspection you wont pass without that light. some people, me, have to put the wing back on once a year to pass then can remove it again.
now that being said the correct way to do it is find a normal galant with no wing, take the 3rd brake light and the trunk install the light and have the trunk painted to match your car.
i actually just bought the light from ducttapeguy and he is getting me a price on the trunk shipped.