Where to find stencil fonts?
Other resources I can suggest are these:

http://www.1001fonts.com/stenciled-fonts.html
https://www.urbanfonts.com/fonts/stencil-fonts.htm

Try out which suits your design best.
Check out sites that have "free" download option for flexibility. 

If not free, you can redo/recreate some letters you need in Adobe Illustrator/Corel Draw, just get the letters you need.