Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
If it were me, I'd put a passenger pillion to fill the viod. I just think it suits the bike better. I to use my bike for commuting to and from work. I am leaning towards a stock low rider seat with a detatchable back rest to put a t-bag on. I thought about bags but afraid that may take away from the look of the Bob. I do know one thing the back pack is getting very old.
You could attach your bag to the Mustang backrest and sit it on the fender bib just the same, and have the best of all worlds. No back seat, no fixed sissy bar and still use your bag for work. Just a thought.