Sourced this little guy in Oklahoma and thought I would pass along.. Had two of these boats over the years and they throw a decent intermediate wake when weighted.. Price looks good including the tower.. Don't know if still available? Either way, here is the link:
http://oklahomacity.kijiji.com/c-Cars-vehicles-Boats-1990-Ski-Supreme-Tournament-Series-with-Big-Air-Wakeboard-Tower-W0QQAdIdZ43100787