How rare is my 1970 Challenger WSS 340 (A91) with Rear and front bumper pads?

We got an all original WSS Package and from what I’ve been reading it is either a 1 of 1 or 1 of 2.

Do any of you have more information about this type of packaging for this mopar

I've heard that they are supposed to be a rare B5 blue color which is what I got, vinyl roof, rear and front bumper pads, wood panals