Looked a little further and the $100 ones are just a finned heat exchanger with a fan blowing on it. JUNK!
Its looking more like closer to $300 to get a chiller and pump that will work for us.
https://www.amazon.com/Active-Aqua-AAPW250-Submersible-Water/dp/B004LQBCYM/?tag=greenrel-20
https://www.amazon.com/Active-Aqua-Chiller-10-HP/dp/B0048IVBT4?tag=greenrel-20