MADISON, Wis. (AP) – Wisconsin companies are being sought for a trade mission to Australia in May.  The Wisconsin Economic Development Corporation has put out the call for companies interested in the trade mission between May 6 and May 11.  The goal of the trade mission is to help small to medium sized companies from the Great Lakes region export products and services to the Australian market.  The Council of Great Lakes Governors is hosting the trade mission to Melbourne and Sydney.  Australia is the fourth largest export market for Wisconsin and second largest in the Asia Pacific region after China.  Any companies interested in participating in the trade mission are encouraged to contact WEDC.