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I got my last one off Bruno, but that may have been his last one also. Worth a try. Oh no hang on, I'll be needing one soon. Don't try Bruno......
Have you considered using three bond? Its a liquid gasket alternative that is supposed to be very good, I am not sure if its right for your application but considering the 156TS has no sump gasket it might be ok to use on a v6.
http://www.threebond.com.au/default.htm