material comparable to Terne II

I am an artist who has worked with Follansbee Steel’s Tern II for the past 10 years. I am looking for a material that is similar in gauge (30), size 28" x 50" ft. and makeup. Thanks in advance for any help.

See here for a few ideas…
http://discus.4specs.com/discus/messages/23/5905.html