Upgrade fares

As usual VS don't make it easy to find out what upgrade availability is, but those of us here for a while know some of the methods.
However has the page on the VS website gone whereby you could select a specific fare code?
I see from the site here Economy codes L, R, B, Y are can be upgraded and get progressively more expensive in that order. So I'd like to check availability of L fares - so I have to call VS for that?
Also the site here says to upgrade even from Y to PE is 10,000 mile s- which Is what I expected, but 30,000 to Upper - but that used to be 20,000 didn't it? has it changed?
However has the page on the VS website gone whereby you could select a specific fare code?
I see from the site here Economy codes L, R, B, Y are can be upgraded and get progressively more expensive in that order. So I'd like to check availability of L fares - so I have to call VS for that?
Also the site here says to upgrade even from Y to PE is 10,000 mile s- which Is what I expected, but 30,000 to Upper - but that used to be 20,000 didn't it? has it changed?