According to the news I could find, the patent lawsuit was settled and oxycodone (generic OxyContin) should still be available at least through the end of next year. At any rate, the brand name OxyContin should be available, although it would be more expensive. See news item: http://www.forbes.com/feeds/ap/2008/09/02/ap5378592.html
I don't know much about MS Contin, but here is some information on it: http://www.healthcentral.com/chronic-pain/find-drug-25283-25.html