ASUS is obviously targeting its ROG customers with the all-new ROG-NVLink bridge, which comes with LED ROG logo that can be controlled and linked to ASUS Aura Sync RGB software. It will be available in 3-slot and 4-slot versions.
Gigabyte has the same idea, only for its Aorus brand. It will be also available in 3-slot and 4-slot version and also have an RGB LED illumination, controllable via Gigabyte's own RGB Fusion software.
EVGA is the latest partner, which pretty much follows Nvidia's C-shaped design, and it also comes in 3-slot or 4-slot versions. It comes with RGB LED lights.
Nvidia has priced its own NVLink bridges at $80, and it appears this will be the theme for all other custom NVLink bridges around, but some of these partners might bundle it with their own high-end RTX 2080 Ti/2080 graphics cards.