Hey Riggsja, first I think you need to decide if comfort or aesthetics are your main priority. Go onto Google images and do a search (Savage bobber, LS650 bobber, S40 bobber ETC...) you'll get tons of pics of different styles and looks. If comfort is important to you alot of people use the stock front seat from the 2 piece seat sets stock or modified. You can make your own seat pan and either cover it or have it covered. As for aftermarket bobber style seats there are tons out there, you just need to decide what floats your boat and then figure out what type and how to mount it.
Good hunting