I thought Capcom was going to make more copies due to the demand. Was that cancelled? Also, wasn't that the case in the US? As far as I know, the game is still relatively easy to obtain in Europe, and last time I checked Sallim lived in Germany.
You're right about the short gameplay hours, though. It also has little to none re-play value, unless you want to experience the jokes and mysteries an extra time. I was so charmed by the characters and stories that I think I'll keep re-playing it forever. Still, I hope the next in the series is more difficult.