Odd, "Before & After" is on the US iTunes, but Finn family related material (and this is true of many other great international, non-US bands that aren't AS bog in the US) is fairly sparse and basic compared to when I see what's available in Australia or NZ or England.
I agree heartily with all the above, though. Recording DOES cost money, but Roundhead is sitting right there for Tim to use as (I imagine) he'd like. I'm sure Neil will give his big brother a bit of a discount to record something there - and probably use the Finn/Partridge Family backup band, as well.
Then there is undoubtably tons of vault material, outtakes, demos, unreleased, etc. The original B&A recordings are floating around out there - and they could easily be put on a deluxe issue (I think they're great). Toss in a couple new songs.
Tim deserves to be enjoying the same late career adulation as Neil. He's a legend, a genius and an institution.