An Alembic sustain block is solid piece of brass, in the same or similar footprint as the bridge, maybe about a 1/2” thick, though this can easily vary. The instrument is routed so the sustain block sits under the bridge, flush with the top. The sustain block can be glued in, or it can be mounted using an insert/machine screw mount. The bridge is then mounted onto the sustain block. I don’t know of any reason why one couldn’t be mounted in an Epic, though I would certainly check with Mica, or wait for someone more knowledgeable to confirm. Of course the thickness of a sustain block is limited by the thickness of the body.
Bill, tgo