Don Burke beat me to it, but definately no Fuggles in a Sundowner. Fuggles more commonly used in English style stouts, Bitters and Ales. Put too much Fuggles in a beer and it will taste like the underside of a lawnmower. Done it a few times!
Dons' post mentions that Sundowner uses Goldings - that would be for bittering, and the Sundowner doesn't have a huge bitter taste, so they have only used a small amount in my opinion. You could get away with using Galaxy and Saaz solely I reckon if you didn't want to invest too heavily on hop satchels and skip the goldings, but up to you. Haven't seen much Galaxy hop about in local Homebrew stores. You'd have to go through one of the sponsors to get some I'd reckon. Heard the big breweries have been buying this hop up by the truckload to experiment with.
Hopper.