Anderson Marine and N/C windows and payne sells rolls of Backer Rods in 100, 300, 500, and 1000 Yards.
They range from 1/8" all the way up to 5". They come in White, Black, Grey, Red, and tan. The price is from $12 for a 100 Yard roll to $ 125.00 for larger diameter 1000 yard rolls. Only problem people might have on this board is that these company are big supporters of commercial fishing and was a big supporter of "NO" on I 696 and will also not support the new Initiative trying to ban all nets in Washington. Its your choice, to shop here or not but I have enough backer rods now for a lifetime.