zinifex historical data

I hope this doesnt break any rules.

I have just recently inherited a "problem child" of a job.

The job is to reconcile the rise and fall of zinc prices from March 2008 to April 2009. This in it self would normally be fairly straight forward.

In this case the problem is the origanal starting figure for March 2008 was based on the Zinifex Recommended Domestic List Price for Special High Grade Zinc, as of mid / late 2008 Zinifex no longer exists. So now i have to compare the Zinifex list price to the London Metal Exchange's list price. To make matters more interesting I was left no notes on wether the origanal starting figure was based on an average price, or on a day spot price.

I have searched the web extensively and have conntacted Oz Minerals (the company which took over from Zinifex) with no luck on either so far. I was wondering if any body on hotcopper would have any Zinifex historical data on the Recommended Domestic List Price for Special High Grade zinc from March 2008.

I know this is a long shot.