I don't believe Series 1 nor 2 are available for sale from Alembic unless you also have them do the install work (but I could be wrong). As I recall Ron custom sets up each set of Series electronics to the instrument to minimize external electrical/radio noise and interference.
If you wish to purchase electronics directly from Alembic for self install it would need to be one of the Activator packages. I didn't see any filter based ones on in the store so I would suggest contacting Alembic directly to see what is available and at what price. As far as non-Series electronics go the Anniversary set are the closest to a Series setup as you'll get (V/V/F/F, w/Q-switches and stereo/mono out).