Decal for Heavy Equipment

I dont know where to post this, sorry if its in the wrong spot. I am searching for a decal to put on my truck, i want a dozer, excavator, and maybe a scrapper in it. I am in a class for heavy equipment and it will be like a class decal for our vehicles. Does anyone know a good place to go online or where i can find the designs? thank you so much for your help!