I bought these clamps and made bolts with proper ends to spread rivets and flatten like original. http://www.ebay.com/itm/DE-STA-CO-453-C-Clamp-/201467157015?hash=item2ee860da17:g:Ib8AAOSwLzdWR4ej or search knu vice or destaco.
Try this http://www.classicandexotic.com/store/csearch.aspx?CategoryID=0&ManufacturerID=0&SectionID=0&PriceRange=0&SortBy=1&PageSize=12&AndOr=AND&DisplayMode=Grid&Condition=-1&Search=Retaining%20Cup
This will fit a 31 president, not 29/30. I believe it is a pierce because the inspection cover on the bell housing is oval. Stude is rectangle. And Stude and Pierce had clutch disc spline differences.
These have been reproduced a couple of times over the years. Here's one http://forums.aaca.org/topic/202247-kelsey-hayes-18-inch-trim-beauty-rings-1932-1934/
I think John McCall has new reproductions that Lionel made. See https://www.facebook.com/162191747280612/photos/a.162197483946705.1073741826.162191747280612/162516343914819/?type=1&theater