i like the slash body but its 1/10 scale right it may be to small to fit the 1/8 backdraft and others
look on ebay for used bodys
also try a truggy body it would easier to pick up a beat up for cheap and do a mach up and then once you see what you need and how to do it pick up  a good body and do the final set up.
thats what im doing with this cheap nikko body.

its made of hard plastic and will bust in a crash so i took almost like brake line and made a cage for it so when it flips it will land on the steel and not the plastic.

i am also planning on making a sand rail type of steel tube body for the backdrafts and sell them and they will look like a sand rail
i am also making steel a-arms, shock towers and other custom parts that i will be selling cheaper than the aluminum as well.