Aqua Safe is based in and ships from West Vancouver. If you call and make a local delivery they will charge you a cheaper rate of $15 USD for shipping (UPS). I just ordered the maximus 100 GPD. The DI portion is transparent so you can tell when you need to change the resin.
Their number is 604-922-3030.
Their email is
aquasafe@uniserve.com
If you call talk to Ed, he is the pro.