There are no current spreadsheets to my knowledge. The problem with fare tables (if they existed) is that taxes and fees can be so variable depending on the precise route and choice of carriers that the base fares really aren't all that predictive in coming up with the "best" price. A cheap base fare from, say, South Africa, could easily end up costing more than a more expensive base fare from, say, Japan, once all the extras are added in, never mind the cost of accessing the origin/terminus points to capture the "cheap" fare.

This variation in prices because of add-ons is why the fares aren't listed nor advertised by booking sites. Most countries and the EU require that airfare be displayed with prices inclusive of fees and taxes. Because these multi-stop/multi-airline fares are all different, they can't be advertised as inclusive, hence they vanished from Oneworld's site.

For the time being, in USD terms South Africa and Namibia still have the cheapest premium cabin prices - DONEx and AONEx. Other origin points with lower-base-cost premium fares are Egypt and Japan, with Norway a surprise arrival in the "lower tier" origin points. For Circle Pacific tickets, Hong Kong is a surprise entry.

In North America, the weak Loonie has resulted in prices that are from 20% to 30% less than ex-USA prices depending on the product.

But again, these are all very dependent on currency fluctuations, and the taxes and fees can have a profound impact on the bottom line.