A long, straight, stiff mudguard? I saw a bike with such a mudguard the other day. It was mounted on the seat tube and stuck straight out horizontally, between the two seat stays, over the brake and then over the rear wheel.

I liked the mount point because it means that the top of the seat tube is protected from crud, unlike seat post mounted mudguards.

Does anyone know where I can buy such a mudguard? Or who makes one like it?
I think of three kind of mud guards that fit the description: musguard, quickfix, and fender bender. 

An other solution is the ass saver, but this is not what you are looking for.