evergreen styrene has some sidewalk or square tile pattern sheets that might work, it would be a pain to get them chrome, but it's a start. maybe paul's chrome could do something with them.
edit: even better:
decorative stainless steel sheets , pattern might be a bit big, but i think they do custom orders.
http://www.quickshipmetals.com/decor...ess-steel.html
here's another place:
https://www.stainlesssupply.com/orde...line/index.php