Current price is $15,568.50, November 2018 from that webpage. $972 if you also need the battery controller module. Installation, of course, is not included. If you're buying a used Soul, simply deduct $15,500 from their asking price and assume its battery pack is toast.
Thank you, Kish, for the wonderful thread by a very informed consumer. I'm researching EVs before getting myself in too deep and regretful.
From your original post of your dealer ticket, I used Google to find out how much these parts would have cost you on this date. Kiaparts quotes them like...