Delay,
When you had your pool installed, who did you buy all of the first round of equipment and who installed it?
Next, since you do not have automation, you can purchase any type of pump. The pump of choice is the Pentair intelliflo VSP. The Hayward EcoStar has been known for a variety of problems, esp the controller that fails. Hayward, as well as most vendors, don't like online purchases or DIY installs. this is to protect their dealers on installs and margins and promote higher cost sales via their dealers. However, the internet is changing this.
You can contact Hayward direct and see what they will do, but if nothing, then go w Pentair. make sure you ask all of the warranty questions on how long and under what circumstances. AND, GET IT ALL IN WRITING with names and locations before you spend a dime...VSP offer better "potential savings" but have a lot more inherent problems...risk reward. I'm on my 3 Ecostar in 3 yrs, and 2nd or 3rd controller, but all covered by warranty. It doesn't remove the endless worry of failure and thus a green pool...Good luck and sorry for your pain....