While alphacool does make nice products, you can get one of this by Bykski off Aliexpress for half the price, heck you can build an entire custom loop off aliexpress on the cheap, I just ordered a full cover block for my CPU for $60, 16mm fittings for $2.45 each, and a 360mm full copper rad for $60, whole thing was approximately $134, all Bykski and all good quality.
In my opinion, Watercool's Heatkiller line are the highest quality blocks available, and these bykski blocks and fittings are right up there, on par with EK (which is overrated in my opinion), and that from an official bykski store (that could be a lie, but they had thousands of positive reviews and I received everything without incident. Bykski even offers a block for my Sapphire 5700xt Nitro+ for $74 which is an incredible price, but honestly I feel like that would be purely for aesthetics as the air cooler keeps it under 70°C, and it wouldn't be providing any noticeable additional performance. It's a shame more people don't take advantage of Aliexpress.... I'm guessing it's either because they'll think they'll be ripped off (which isn't an issue as long as you order from a store with good reviews) or they can't way 2-3 weeks, which I have no problem doing for items at literally half the cost you find them for on Amazon.