You can get chrome metal tape at Pep Boys etc. When I did the same years ago, I cut out a circle of it just larger than the hole. Taped that over it, it conforms to the round support and is barely noticeable.

 

^^^Ditto^^^

I have a great Ace HW down the street...plastic and/or rubber plugs for some of my projects & they always have something.

 

I got some chrome bolts and acorn nuts and used the angled section from the bag guards

 

I like the gaurd for looks & function. To me it looks like something missing without them, & cheaper with out unless it's a all out custom show bike.
Imagine all the money Moco made from not installing them, in sales of bags afterwards.

 

Yup Herrf-that's the same thing I did,looks ok to me.

 

Leather wrap.

 

heres a pic

 

I took mine off and replaced the rear crash bar with comfort fit. Looks way better and solves the hole problem on the original crash bar.

 

This would be an excellent time to bolt your bags in place and get rid of the split pin spring clip thingy. With those guards gone there is nothing to catch your bag when the thingy fails.