When we bought our 04 34fdds, we inquired with the factory about a change to the booth.
Initially, it looked reasonable (~$1000 I recall). But then they realized the dinette booth would cover a few things like the central vacuum and the propane or CO sensor.
I'm guessing they locate things a little differently with the free standing table.
Anyway, it may be worth checking with the factory for a booth and you may want to check what gets blocked if you do it.
Another thought is the booth doesn't look like a difficult build (either for a DIY or a shop). I was able to find matching upholstery for another project, so you might be able to match the cushions too.
2004 Alpine 34 FDDS
Anaheim Hills, CA