Backyard chef edition

I actually had to look up exactly what you were looking for, my google search believes you're looking at the BGE Metal Tables here: http://www.biggreenegg.com/eggcessories/custom-cooking-island/ ??

assuming that's correct, the dimensions are right there on the PDF brocure; the 76 inch model, is 39 inches deep, and the 60 inch model, is 31 inches deep.

I believe those are made for BGE by Challanger.  You might want to check what Challanger has to offer as they have many configurations and will make one to your specific requirements is you want and have the $$.