http://www.secondwindbmw.com/
25 Craftsman Lane
Merrimack, NH 03054-4632
(603) 598-2697

Its off of 101A basically theres a small road across the street from PC Connection and Mile High Apple Pie (or whatever it is). Its 100 feet down that road on the left, theres always bikes outside.

(I was there today lol and will be back Monday to pick up more parts)