Greetings, Guys!
Just chiming in here.... I'm not sure if the thread sizes will match up, but Prussian Glory carries replacement spikes, hardware & chinscales of all varieties. They are made in Germany and their quality is generally very good. A query to Tom Sebold, who owns/runs the site could likely answer any questions. I'm sure most of the forum knows about this site, ie, prussianglory.com. I recently had them make me a pre-war dunkelblau Prussian General staff officer's uniform. They do great work!
Cheers,
Terry