I was fortunate to find a set of Star dies in 380 ACP, including a Lifetyme carbide sizing die. However, I'm pretty sure that CH Tool and Die made die sets in 380 when they did their run. You might check if they have any left. Also, I know that Rich Daniels (barrel tester) has done some work with turning down standard dies and cutting them with the Star thread. I just picked up a new lathe (by new I mean 1946) with a tool post grinder, so at some point I plan to try turning down some standard dies as well.....but its way down on my priority list.
Hulme sold an adapter kit for 380. It includes a replacement ram for the case feeder, and a 380 top plate. The replacement ram is milled down to create a flatspot which is positioned at the top. that way the cross section of the ram is only tall enough to catch one .380 (or 32 ACP) case at a time. The top plate is similar to a 9mm top plate with some adjustments to account for the shorter and smaller diameter .380 case.
I could reproduce both parts for you. I have the stock and the tooling for the ram. I have some of what I need for the top plate but need to pick up some special end mills for the top plate.
