There are other places to get big firepit kettles, but these two are a good start:

http://www.firekettles.com/

http://www.firepitart.com/

This large metal caldron was purchased in Napa, CA, and it was one of its kind where we purchased it over a year ago. They are a bit hard to come by. So many people are asking about it. Here's a link to a firebowl resource on Etsy.com that looks really nice!
http://www.etsy.com/listing/56093841/the-big-bowl-o-zen-37-inch-modern-steel?ref=sr_gallery_7&ga_includes%5B%5D=tags&ga_search_query=fire+bowl&ga_search_type=all&ga_view_type=gallery