No diamond plate unfortunately. That is a rare find at the curb, and why I have none

If you need a small piece, I have a good relationship with a steel supplier in South Plainfield, they do small cut-offs of any size, and don't mind small orders.

BTW, diamond plate for your plasma cutting table? Wouldn't you want to cut on a non-solid surface? Like a grid? The reason behing, is you get better cuts when you can cut THROUGH the material completely, and not have a reflecting flame coming back up.