I've never seen plans for either pilot version of the set. Recall that the two pilots were shot at a different facility than the production. So all the sets were packed up and carted across town when NBC bought the show and reassembled differently, and got more sets. This is why the circular briefing room and the long straight corridor never appear in the regular episodes.
If there is some extant blueprints showing how that stage was laid out, I'd love to see them too!