Water pump leaked – 1983 Mirada

Hi all. Everything has started this Friday, when the coolant leaked. I went to the garage and started my Mirada, and then I noticed coolant leaking badly. Well, I have disassembled my cooling and discovered the water pump leaked. Now, I was wondering if it's okay to grab an aftermarket water pump? Or it is not a good idea? As I am familiar with lots of afermarket things, yet have never had an aftermarket water pump. I do not feel like I want to deal with the repair of what's leaked, you know...
Author: Davman