Here is a list of all Mazda Dealers in the area that I know of:
128 MAZDA - You checked
618 NORTH AVE
Wakefield, MA 01880
WELLESLEY MAZDA - Unknown
965 WORCESTER ROAD
Wellesley, MA 02482
MAZDA GALLERY - Unknown - It's on the Automile, might have one
918 PROVIDENCE HIGHWAY
Norwood, MA 02062
VACHON MAZDA - Unknown
957 WASHINGTON STREET
South Attleboro, MA 02703
TULLEY MAZDA - No Mazdaspeed
147 DANIEL WEBSTER HIGHWAY
Nashua, NH 03060
SENTRY WEST MAZDA - Mazdaspeeds here: Mostly '05 to my knowledge
940 BOSTON WORCESTER TURNPIKE
Shrewsbury, MA 01545
NORTH END MAZDA - No Mazdaspeeds (no miatas in stock at all)
747 CHASE RD
Lunenburg, MA 01462
GALLO MAZDA - No Mazdaspeed
70 GOLDSTAR BOULEVARD
Worcester, MA 01606
TASCA MAZDA - I'd check here!
1300 PONTIAC AVENUE
Cranston, RI 02920
TALARICO MAZDA - Mazdaspeeds Here: I'd check!
850 GOLD STREET
Manchester, NH 03103
O'HARA MAZDA - Unknown
37 ALDEN ROAD
Fairhaven, MA 02719
SEACOAST MAZDA - Unknown
180 SPAULDING TURNPIKE
Portsmouth, NH 03801
AUTOCENTER MAZDA - Unknown
1199 WEST MAIN ROAD
Middletown, RI 02842
GRAPPONE MAZDA - Your on it.
RT 3-A BOW JUNCTION
Concord, NH 03302
CENTRAL MAZDA - Unknown
98 LATHROP ROAD - BOX 147
Plainfield, CT 06374
AUTEX MAZDA - Unknown
94 KEY ROAD
Keene, NH 03431
MCGREEVY MAZDA - Unknown
ROUTE 106
Belmont, NH 03220
BALISE MAZDA - Unknown - They might (holing down the fort for Western MA.
635 RIVERDALE STREET
West Springfield, MA 01089
MORANDE MAZDA - Unknown - might be worth a call though.
171 TOLLAND TURNPIKE
Manchester, CT 06040
Good luck man!! The miata cruises are coming up. There were 2 yesterday!