You're thinking of adding one? expensive; and dangerous- celicas are unibody frame and you'd be damaging the hell out of it. The 6th gen convertible is a chop top and WAS a unibody frame before the convertible company got to it- they had to add chassis welds EVERYWHERE to make it structurally sound again- even welded the entire underbody together.
It'd be a hell of a lot of money
PS: sorry, can't help you with the photohop request