Does anyone know of a shop (like Bass Central, basically) that would have a few Alembics in the NY-Philadelphia area? I would love to spend a little time on an MK5 before buying one.  
 
Thanks in advance!

I ust realized that I put NE as in 'North East', but it is likely to be seen as Nebraska. Sorry!

I can't answer your question directly, but I recommend searching out some folks here in the club that may live close by.  They would probably be happy to let you sample their wares!

Guitars or Basses? In CT we have Brian's Guitars, and they always have 2 or 3 Alembics in stock. No basses or accessories though, which is a bummer.

Basses, thanks. I am thinking of going for one of the Balance K MK 5's.

Looks like the closest dealer to you is Washington Music in Maryland.  
 
There are a number of club members in the area and they had a get together a few years back. I bet someone in that group has a Balance K 5 stringer and might be willing to meet you someplace and let you check out their bass.