https://www.techpowerup.com/261060/ek-launches-d-rgb-water-blocks-and-upgrade-kits-for-amd-rx-5700-series
 
EK Water Blocks, the leading premium computer liquid cooling gear manufacturer, is releasing EK-Quantum Vector Radeon RX 5700 +XT D-RGB water blocks that are compatible with reference design AMD Radeon RX 5700 and 5700 XT graphics cards. These water blocks are an evolution of the EK-Vector Radeon RX 5700 +XT RGB blocks which featured regular RGB. The new Quantum blocks feature 5 V D-RGB addressable LEDs for even more lighting customization and control of every LED diode separately.

As with its predecessor, this water block directly cools the GPU, 8 GB of GDDR6 memory, and VRM (voltage regulation module) as cooling liquid is channeled directly over these critical areas. The base of the block is made of high-grade copper or nickel-plated electrolytic copper while the top is made of high-quality acrylic material or black POM Acetal material (depending on the variant). The entire plexi covered block is lit up with D-RGB while the acetal version is implementing D-RGB in the aesthetic white corner piece. The top material does not affect the block performance in any way. The block also features a special plastic cover over the block Terminal which is also lit with addressable D-RGB. This add-on is designed to reveal the graphics card model, visible from the side. Sealing is ensured by high-quality EPDM O-Rings.
 
In the table below are the listed pricing for these. I believe the prices are fair and reasonable.