Interesting, it is a little worrying if you cannot find Portman on our website. I am looking at it now! http://www.crockettandjones.com/Product/Portman-3-Darkbrown#.UTB_IDDJR8E
Which website are you looking on?
Here is some background info for you on PORTMAN... The original Portman was on the 337 last, Portman 2 was on the 350 last (the last was subsequently dropped from our entire range) Portman 3 is on 358 last which is currently run in London only
If any other version of Portman are available in store, it will be old stock and probably only available during sale periods.
I hope the above helps.
Crockett & Jones