There already are similar things out there for plugging those handle grip holes in the side panels of your machine, but why have a plain and boring plug when you can do it with some style and added coolness factor?
So I drew my own version with a nice little FF logo and text!

I found out it comes out better for me printed face down, but it might just be my noob printing skills! The upper one in the pic is printed face up(can't see the crappy underside in that pic!), and the other one face down. I kinda like how the face down version turned out. Printed on k(r)apton tape, the mirror like letters pop out nicely from that rough backing.
But please, let me see how it turns out for you if you decide to use my design to plug those holes! :)