357,
Being the hoarder that I am, I just can't leave a piece of metal alone. Not unlike me to pick up the smallest scrap of steel, aluminum or brass or whatever I can find. (Good thing my Wife is scared of going into our crawlspace) I'm sure I have a piece of something that would fit your needs but may need trimming or drilling or whatever to fit the space. Dismemberment of discarded electronics have yielded some good scraps I save for a rainy day. None of my "scores" helps your needs at the moment, but a sharp eye in your everyday treks could yield a perfectly useful piece, that with a little labor, could solve your problem.
Good Luck!
73
David