i've seen it in the store but didn't take a look what year they were made. that size is very smooshy and actually holds lots.
I think they can still be had, I think I have seen one in New York within the last 12 months. Was clemence, so it will be soft.
There was one on eBay a while ago as well. Pre-owned.
Good luck in your hunt.
rb - from my personal experience, if the birkin is your holy grail then I would wait a little longer and get it first. The wait can be frustrating at times, but I don't think you will regret it.