If anyone wants to try contacting Levi's again, here are some pics to identify where they sold these particular jeans. They were Levi's 550 series, but I believe there were different jeans within this range. Perhaps different ones were sold in the US/Canada/Europe. Long shot but worth a shot.
Strange, it's working for me. Anyway, just did a crude crop of the clearest image I could find.
Let me know if that works and is any good.