It is however quite easy to strike fire with flint and steel . My strikers are made from very high carbon tool steel and throw a good hot spark. Let me know what size you want. These are decorative strikers that can be hung as a pendant, etc. Pendant strikers have been found at Birka, and they were used also by the Native Americans.
Shapes vary also.
While the Vikings used a number of different styles, this seems to have been one of the most common. Also, it doesn't seem to have been used by any other culture. The larger sizes seem most popular, but I believe the smaller size is more typical of the Viking Period. The Penannular style of pin goes back many centuries, if not millennia. The Vikings used them to fasten their cloaks, and the Scots used them for their kilts.