I have seen aluminum sheets with the diamond tread design and a chrome finish available at Lowes. You could use that with a couple stainless steel carriage bolts.
Or if you have any local steel fabricators around town, they may be willing to cut a few pieces of steel to the dimensions you need and they can even puch the square holes for carriage bolts to go through.
btw CD, I am telling Rampy you stole his *shrug*

Unless, of course, you have express written permission from Rampy to do so.
