I actually just bought one for my gen 2254.50 last week from an AD. I am trying to sell it right now on TZ (just put it up yesterday under username "hypo"). I just happen to like the bracelet better...
You can get one new from Ofrei's. It is about $215 plus shipping for the PO style strap and buckle.
This is the style I'm talking about:
Be careful, because the replica straps are made for the PO case, and they won't fit a SMP case. The genuine PO strap won't fit the SMP case, either.