Adding ball bearing to X axis linear rail carriage?

Does anyone have a procedure to replace ball bearing in the X-axis linear rail carriage?

Absent that, a good source on a carriage for the linear rail?

(I’d hate to replace an entire linear rail over a few ball bearings.)

On the creality HI wiki there is a instruction video:

This is to replace the entire linear guide (what I stated I DIDN’T want to do.)