Will Lord in the UK is an expert on Stone Age tools and skills. His father was the curator of Grimes Graves in Suffolk, England, the surviving Stone Age flint mines that produced the unique large, black, 'pavement' blocks of flint from deep underground. (Mines that also produced the gunflints for the English and East India Company armies during the Napoleonic war and beyond). And demonstrated flint knapping to visitors. Will carried on from there with his own lifelong fascination for that earliest period in European history, turning his passion into a business imparting his skills and knowledge.
Will also knaps the finest English black gunflints for sale. And has produced a 16 minute video that can be purchased and downloaded that takes the viewer through all the stages and equipment required to knap your own.
I buy my gunflints from Will and only discovered his video yesterday. Having just watched it I think it is well worth the cost.
For his web site search 'beyond2000bc'.
Enjoy.