Not trying to sound like a jerk but why did you post here instead of on the Alembic site or contacting them directly? I have always found them to be very responsive. I'm sure they can build anything you want as long as you have the money to pay for it.
"If you don't want the truth don't ask. Make up your own like everyone else does". (Michael Pare as Eddie Wilson/Joe West in Eddie and The Cruisers II).