Are there any good worth-while microcenter alternatives to these parts?

I have a couple parts on my PC parts list thingy that are not available or maybe have not even been sold from micro-center whatsoever, so I am asking if there are any go-to replacements that I could be pointed towards which still function the same and are on the same level and price point as these parts.

I also have another question to any of you who work at microcenter, can any of you tell me when the MSI NVIDIA GeForce RTX 4080 Ventus 3X Overclocked Triple Fan 16GB at Mayfield Heights is going to be back in stock, because I was really looking toward that one and it's out of stock now.

Parts:

DeepCool Liquid Cooler 360mm Castle 360EX ARGB - (insert amazon link here)

Super Flower Leadex III Gold 850W 80+ Gold - (insert amazon link here)

Mushkin Enhanced Redline RGB 32GB (2 x 16GB) DDR4 3600 - (insert newegg link here)