Crumb! Does it really look like this?
[img]http://www.********.com/getimage/getimage.php?imagekey=2742168&imageurl=http%3A//www.********.com/info/QuintonHazell/321586.jpg[/img]
Try
www.summitracing.com and shop Diesel cats by inlet/outlet diameter.
FWIW, Amazon shows a Bosal 289-119 catback replacement for $220.
Sixto
87 300D