Here is the list I compiled of the CO2 (Welding Supply) vendors in the Brockton area:
Total Welding Supply Inc
201 N Montello St, Brockton, MA
(508) 559-0977
20lb 125 - refill $14.55
North End Supply Co Inc
314 Linwood St, Brockton, MA
(508) 587-1201
10lb
20lb
no answer
MMT Industries Inc
711 S Main St, Randolph, MA
(781) 963-6267
10lb refill
20lb refill
no answer
BOC Gases
97 Maple St, Stoughton, MA
(781) 341-4575
20lb $135 - $28
Airgas East
5 Pond Park Rd # 1, Hingham, MA
(781) 740-0087
too far
New Bedford Welding Supply
686 Broadway, Raynham, MA
(508) 824-2790
5lb $75 refill $11.20
20lb $125 refill $18.23
Daven Corp
25 Adams St, Braintree, MA
(781) 843-6308
10lb refill
20lb refill
no answer