*Edited* Now that I know what BIA stands for my advice is fairly useless :P
But if all else fails you can buy single coils from FedEx Office (aka Kinko's). They have a variety of sizes in stock all the time because they bind so many projects. And most stores will sell you the coils by themselves for around 25cents. And really any print shop should have them in stock, doesn't have to be FedEx Office ...
They won't be the exact same coil type, more like a spiral coil. But it will fit the holes and you just spin it on.
HTH! Sorry for being a dunce