Both were available for FS9, they were also the 1st and 2nd FSX releases from IRIS (possibly the F-20 was just before or after, can't remember)
Since then, the FSX versions have had a free upgrade, plus an optional pay extra major upgrade. I'm guessing at some point after that, the fully upgraded FSX bird replaced the older vanilla one and the FS9 one vanished from the catalogue.
Pity as it's a sweet bird.
Jamie