I started tearing into my 'new' trailers brakes. The axles are 9k+ a piece. I am assuming this since the drums are a tad over 4 inches deep. And the bearings are huge. But, all I have are the drums. There are no guts. I have tried calling around and all to find what kind thet are so that I can order the guts. But, I am running out of luck. Can anyone help?