After much searching through parts catalogs and websites, I finally found a Walker universal cat for $118 at Jegs that pretty much slipped right on. Of course I spent a couple of hours grinding the welds off the old cat so I could graft the new one onto the existing pipes, and I needed a couple of reducers, but heck, it worked! Just got the call that she passed the sniffer with flying colors. Just had to share my glee!!