I have an INS180 with the Ecoplus1056 pump. The impeller magnet has swollen and I need a replacement but I can't seem to find them anywhere. Anyone know where I can get one. Or if I could steal the needlewheel off of mine and easily add it to a regular impeller assembly for these pump. I have seen the regular impeller assembly available online. Or, as a last resort, anyone know a pump I could replace it with? I know the Eheim pumps are available, but I don't have $300 to spend. Thanks!