I'd say so. Heinnie also sell them: http://www.heinnie.com/search.asp?strKeywords=nowill+survival&submit=J Adams http://www.sheffieldknives.co.uk/acatalog/2-88.html
Is 50-55 pounds a good price for a new knife?
http://www.heinnie.com/Survival-Knife/p-0-0-1159/
The John Nowill knives often don't come with a very good edge though. There's lots of great advice on this forum about sharpening them up though.
Well worth the money in my opinion.
They're the real deal. I think webtex does/did an imitation of the MOD survival knife too, but not as thick, and not nearly as good quality.