UPDATE: New version of this: https://www.thingiverse.com/thing:3713949
This is a remix for use with the stock Chiron hotend, using a 5015 blower for the filament cooling. The cooling ring comes from the Rev 3B shroud in the files section of the Facebook group https://www.facebook.com/groups/2168219426798485/. The TinkerCAD project is here: https://www.tinkercad.com/things/59udXs5KuK2.
The cooling ring in the photos is an earlier off-centered version; the corrected one is in the files (didn't take a new photo). The center piece combine is combined with the connector board holder; the board slides in and is captured by the left side.
These shroud pieces also allow use of the leveling probe.
[Yeah, I know it's not pretty, but I'm more of a functionalist and engineer than I am an aesthete...]