I forget the source of the first picture but I know Jeremy (jeremy5848) had one fabricated. Someone talked about offering such a pipe but I don't know what came of it. In any case, such pipes only make sense for a 617 since there are no factory replacement pipes. If you have a 603, try the parts forum, eBay or a scrap yard for a replacement pipe. Heck, it might not even cost that much through MB.

Sixto
87 300D