90° Angle Corner Brace (Redwood City)

I am in search of a 90° angle, similar to the photo. Does not have to be black, or even that brand.

The dimensions of the item are 1.6 in. H x 3 in. W x 0.125 in. D, however, I can go smaller.

If you have one that you are not using I would love to put it to immediate use!

Thanks!