There used to be a spreadsheet listing base xONEx prices from every country. This was populated by a table on the oneworld website which listed these prices.
During a website update a few years ago, this table was removed, presumably because it listed base prices without taxes etc, which is illegal in many/most markets.
When the table was removed, the spreadsheet stopped working.

Currently, the only ways to get a price are to use the planning tool and hope it gets through to a quote, or to use sites like expertflyer to look for prices on a per port basis.