Pern; I have an end cap for a power feed, if that would work for you. I noticed that the picture shows a complete circle, I assume for a bearing. It is open on the bottom side for the body of the power feed.
I can post a picture if you like.
The right hand bracket has one free floating bearing, the left hand holds 2 bearings and is drilled and tapped for the 3 holes to capture the bearings. The left hand bracket can be on the left or the right, but the older right hand ones with no holes drilled or tapped cant go on the left without being drilled and tapped.