I'm mounting a set of SKS P45s to my '05 Redline Conquest Pro. On the rear fender, however, the Redline frame doesn't have a cross support between the chain stays where SKS provides hardware for a mounting point...

Anyone have any experience mounting these fenders to a frame without that support point? Do I just get creative with zip ties or something? Would love to see a photo or two if you've run into the same problem and have a solution...