I have played several Alembic Tributes and own three custom Alembics (with a fourth on the way). If you are looking to approximate the look and feel of the original Tiger as best you can, the Alembic is not the guitar for you. As the name implies…it is a Tribute to Jerry and not meant to be an exact replica. I've got a Tiger from Leo and Scarlet Fire and couldn't be happier. There are several other luthiers mentioned in numerous previous posts. As stated above, Tom Lieber's Tiger is over $30K - the most expensive of the known commercially available replicas. I have spoken to Mr. Lieber about the price tag and completely understand and respect his reason for it.
The Alembic's strength is its tone. I believe (and others may respectfully disagree) that the proprietary electronics from the folks in Santa Rosa can get you fairly close to "that sound" with a lot of different amps. This way you don't have to invest in duplicating Jerry's rig exactly - though with the price tag of the Tribute being what it is, you could get a Tiger from Scarlet Fire and still have enough money to buy the necessary components to duplicate Jerry's rig.