Running Board Question

[DenaliNebakenzer]

I have a 2006 Yukon XL Denali, and I've always wanted to put the running boards from an Escalade ESV on it. I finally found some at a salvage yard online, and had them repainted. I went to attach them to my Yukon, and of course I find out the hard way that the brackets are different. Here's the problem. GM discontinued the brackets, and now I can't seem to find them anywhere. All the parts catalogs for the online yards show Running Boards, but there's no way to search for the brackets.

Has anyone removed the Running Boards from their Escalade ESV, and looking to sell them?
Does anyone know where I could possibly find them?

Any help is greatly appreciated. Thanks!