I have several old and newer elctric blankets without the cord/controller. How can I find where I can get replacement cord(s). I have searched e-bay and found a few that look like they might fit but don't know how to match the products #s on the blankets to the cord #. I have one new blanket with the right cord and the numbers don't match at all. The above number may not be correct it is a full size and the one I'd most liket o replace.