Surfing the net this evening, looking for something that I had lost when I came across these. Those guys who play modern zombie my like these they could make signage, cordons vehicle symbols. They are US emergency first responder fonts. Anyway have a look they're here and they're free.
I found them through this website.
This chap has free downloadable NATO battle map markings in fonts. Not got the hang of the ones I want yet but some of you may enjoy them.