Mike,
I googled “Charles Woodward Stent tool and cutter grinder” and it came up with (among others) this copy of Roundhouse magazine. It is the Rugby Model Engineering Society’s club magazine. It is, however, dated Spring 2008. On page 20 there is reference to the editor, Charles Woodward and gives a full postal address, telephone number and an email address. None of which I am willing to publish here. Bearing in mind the passage of time since publication, you may or may not feel inclined to use this information.
John