Free Floating Shelf Bracket. If you can't buy it build it!
Well for about $10 in materials I was able to mock up a shelf bracket that's pretty darn stout. I figured I would share my method.
1/8" flat aluminium
3/8" all thread
5/16" drill bit
(2) 3/8" nuts
(2) 3/8" lock washers
sharpie and a tape measure :)
Router table or router with jig to route out the back of the shelf. I routed out 3/4" because that's how wide my flat stock was. Depending on your shelf width will determine how wide of flat stock you will use. My shelves are 1.25" thick.
Measured out a few times, and drilled precisely into the shelves... This is crucial to get the shelf level. I cheated and used my new to me dowel jig.
Here are the pictures of how I went about laying this out.