For those of you who want one, here are 2 sites on the Internet where you can buy them:
Fancy Wilkinson-made:
http://www.1esa.com/FairbairnSykes.htm
Plain Jane:
http://www.ioiltd.demon.co.uk/hunting_knives/stillettof.htm
Note: If you are also interested in the Applegate-Fairbairn Fighting Knife by Boker (I think Gerber no longer makes theirs):
http://store.knifecenter.com/pgi-CustomListProducts?Boker%20Applegate%20Series%20of%20Combat%20Knives,2,16,=,bo,&,60,=,applegate
Fancy Wilkinson-made:
http://www.1esa.com/FairbairnSykes.htm
Plain Jane:
http://www.ioiltd.demon.co.uk/hunting_knives/stillettof.htm
Note: If you are also interested in the Applegate-Fairbairn Fighting Knife by Boker (I think Gerber no longer makes theirs):
http://store.knifecenter.com/pgi-CustomListProducts?Boker%20Applegate%20Series%20of%20Combat%20Knives,2,16,=,bo,&,60,=,applegate