Took me a moment to find the i386 build, too. I was also interested to see how to find these drivers more generally (i.e. older, superseded drivers).
The trick is to start at Nvidia Graphics Drivers (stable) : “Canonical Kernel Team” team, then:
- Open the "View Package Details" link.
- Search for "550" but filter by Superseded instead of Published (and can select Noble instead of Any series).
- Find the package in the list and hit the ▼
- Look for Builds - and that'll take you to the page for each architecture.
Hoping to install these drivers tomorrow, so should be able to confirm if the 550.163.1 series is still good on 24.04 with the RTX 2060.