Richard there are lots of places in Boston and J Freeman in Dorchester that sell it. There is also a place in Worcester. I need some to fix a reactor and don't want to wait for delivery. The plate that holds the media keeps getting pushed up by the flow when the chamber is still 1/2 full so I am going to glue it in place. I am tired of coming home to a pump full of reactor media when that plate flips over. I am going to take a ride to Worcester if I can't find some anywhere else.Call mcMaster Carr and they'll deliver it to you in 3 days. It'll take you longer to find it locally. Or give Gustavo a call, he can lend you some.