Detroit Axle has been manufacturing and sourcing replacement auto parts for 20 + years. Likely just fine.
I have been buying auto parts from Amazon for quite a while. Their parts lookup is AWFUL but… If you use RockAuto or another source to determine which part to buy and THEN price it on Amazon, you get a price comparison.
If you are a Prime subscriber, that free shipping alone can swing the deal from RA to Amazon. This is especially true with heavy stuff like brake rotors… very pricy shipping from RA.