I don´t think so. Sustainiac is only driver, sound comes from bridge pickup.
Anyway I can´t see advantage of "sustained" variax sound. Shorter sustain you can do via compressor or overdrive too, and infinite sustain is so different sound, that really doesn´t matter if it comes from strat, lespaul or whatever.
For example ebow partly works for acoustic guitar too. But this sound is not like acoustic guitar at all.
see my crazy friend http://youtu.be/cqDWNcl6EaA
principle of sustainer