Been away for a while (family stuff).
As I remember Fernades do 2 sustainer kits. One with the 'humbucker' driver and one with a 'single coil' driver.
I'd be tempted to go for the single coil one and mount a proper pickup close to it (with appropiate shielding).
The reason for using the neck positon is not to separate it from the bridge pickup but simply because it has to induce a large enough movement in the strings to get a reasonable volume.
Personally I'd love a sustainer of some form in a guitar (but then I love the drones sounds in eastern music and would be excellent for a freaked version of 'Venus in furs').
As for the Ebow theryre little buggers to take apart (lets say like some security equipment I work with it's fragile, so when it's taken apart it breaks / self destructs). I do have a diagram for one somewhere (uses the usual LM386 opamp to drive it).
Godley & Cream (spelling ?) ex of 10cc (euuugh) and video directing, produced the gizmo, which was a rotating wheel system down at the brigge that sounded really good (forgotten what tracks used it though).
As an alternate method, I was thinking it would be possible to use piezo transducers @ the bridge to induce string movement.
Yeah pog combined with a sustainer would be excellent fun :)
Rob...