Likely retail sources that are fairly local:
You-Do-It Electronics
[
www.youdoitelectronics.com]
40 Franklin Street, Needham, MA (take Exit 19A off Route 128/I-95)
Open 8 AM to 9 PM M-F, 9 AM to 6 PM Saturday, Closed Sunday
Electronics Plus
[
www.electronicsplus.com]
480 King Street (Route 110), Littleton, MA
Website doesn't bother to list business hours.