Those officials obviously aren't very educated if they're telling you to get a heat rock.

The box looks good so far, and yes, a UTH is necessary as soon as possible. Poor little thing... it's so scared that it won't move. Maybe gently place him inside the hide, to make him feel more secure. Provided it hasn't appeared aggressive so far. No need to get bit.

Hope he finds a home, maybe with you! You never know - they ARE addictive!