I think I've come up with an idea. Obviously I've got to widen the front (or make the mounts come in further), but that's the easy part.
The back, I came up with a Squarish/rectangular piece that fits just insde the metal hooks that used to hold the rubber in place. I figure I can bolt that right to the frame, then I will have two bolts welded to where the CX mount used to be that will fit into rubber and then down into holes on the rectangular mount. I can then hold it down with wingnuts for easy removal/install.
I'll grab pics if anyone is curious..