If it still works use it as it is, dont monkey around.
If you are practical, and take your auto apart, it is easy.
Lots of people give me zip lock bags full of camera parts, normally a few bits are missing.
P.S. the best tool is a graphite pencil eraser, you may need to grind down needle nosed pliers, if there are special nuts to undo, dont use normal pliers, without protecting the jaws with bits of old rubber gloves...