Buzz Tools has a coal hard hat with a light and a hercules piece of equipment designs. There is a coal pick ax also. Choose your format and it will open into another page. Every design on the tool page will be downloaded. These are free and don't require a log in.

Not a lot of selections but how about these?

I hope you can use it

thanks so much..we are a coal mining family and it's really hard to find designs to put on boy clothes.