I also have a VZ 24 for my build.

Duane Wiebe, at http://www.soundmetalproducts.com/About_Us.html

Produces a high quality set of bottom metal for the 404J that plugs onto the 1898 action.

I have also considered using one of my 1909 Argies, but I would have to first anneal, and then re-carburize/heat treat. That gets to be a spot of bother.