What is a good aftermarket battery option?

After shopping around for my iPhone 7, just to end up with poor/sub-par batteries from four different suppliers, I have a rather negative outlook towards replacement iPhone batteries. I have used iFixit ones before, and although they are the best I have encountered, they are too expensive (margins) and due to my Australian location delivery costs/time render them not an option.

I am at the point of buying faulty/locked iPhones in the hopes of good batteries!

So, as an alternative, just seeing what other suppliers/brands people have used in the past (particularly if you live in Australia).

Thanks in advance!