Wikinson Sword was bought over by Weyersberg, Kirschbaum & Co (WKC); and the former Wilkinson-style F-S daggers are now made in Solingen, Germany.
-http://www.wkc-solingen.de/newshop/ukfsdetail.html
You can also check out the genuine authorized F-S offered by Brigade Quatermasters; they're made by Reg Copper of Sheffield, England.
-http://www.actiongear.com/agcatalog/picsxl/AG_FCD02_L_3.jpg
The French company, Chevalier dAuvergne have filed under "Historical Weapons", their version of the WWII French SAS F-S dagger. Hit the "choose button" and then look under the selection of "Poniards/Daggers", it's listed as the "SAS RPIMA dager".
-http://www.chevalierdauvergne.com/fr/
The Czech cutlery company, Mikov Knives has an F-S type dagger as well, listed under it's Military Knives and Daggers section. It's known as the "Commandos", model #399-OK-1.
-http://www.mikov.cz/index/index_en.html
There aren't many reputable companies which manufacture the British F-S type commando dagger. Largely because it's a specialized relic from the last major war and sadly, is pretty much ancient history to many today. Daggers are prohibited in many areas of the world, thus limiting their market to just military collectors/historians or that very rare military order (probably as a comemmorative)...
-http://wilkinson-fs-knife.blogspot.com/