This is a printable model of the black locking ring that holds the rubber boot in place.
I removed the "wings" on the latches at the top and bottom as these are to thin to have any structural strength when printing. I believe they are there only to simplify assembly as the 6 latches have an irregular pattern and must be positioned exactly right to fit the housing.
I made a text marking showing the top direction under the part. The text will probably not be very readable but at least serve as an indicator when installing.
The latches are very small but seems to hold up ok.
The ring can be removed in one piece and be reinstalled if you are careful but it might be better to print a few extra rings so you can install a fresh one afterwards if you ever need to remove the ring again.

Creality

Ender 3

No

No

100

50

Can be printed with or witout support under the 6 latches.
The latches are quite tiny so us a resolution as high as possible and maybe lower the printing speed a bit.