Driveshaft Hump?

i have to cut my floor for the driveshaft soon, and I was wondering if theres any tricks to having it look cleaner with the hump, like how people use trailor fenders for tubs, ect.. is there anything sold i can use to have one nice tunnel? or would it be just as simple to bend some sheet around a small tree or tube, ect lol, what gauge should i use also? thanks