Fenders for My teardrop

I am finishing up on my 1946 Teardrop rebuild. I want to put fenders on it. It has 15 inch tires and I just want to put basic fenders not spend an arm and a leg. I am working with 1/2 inch ply wood sides and the alumninum. I remember seeing a site where some put some round fastners up then hooked the edge of the fender along the fastners. I do not know what the fastners are called or what type of fenders they were that have enough of an edge to work with the fastners. Anyhow any help would be appreciated. Hoping to go camping in September!!!!! Thanks ~Jillian