Dear Sir,
You mean bottom round base plate and foot screws of Sokkia C410. if yes, then I have it both.
Please mention me where are your located and how much pcs. you want.
I also have all spare parts of Sokkia Auto levels - C320, C330, C410 and B40.
hence if you require any other spare parts please forward me the complete list of spare parts.
Awaiting for your reply.

with thanks,
Sunil.