Some years back, i needed some mounts for my sami, and by searching the net, found that old dodge and chrysler V8 mounts could fit. I found some for about $6 each and bolted them in after drilling out the main hole and getting nuts to match the mounts. Cheap as chips. These are always in stock at auto parts stores.
Now i never did try them with a kick mount though. Not sure what the size difference was, but sounds like it could work as long as it fits pretty well.