[LargeFormat] Small Brass Screws - Suppliers?

[Clive Warren]

Am still looking for a supplier of small brass screws round head and 
countersunk - nickel plated would be a real bonus!  There seem to be a 
number of old wooden cameras around here that are in need of some fettling, 
together with some lens boards that need finishing. I used to make all my 
nuts and bolts out of stainless steel for various hybrid motorcycle builds 
-  trying to make fiddly little tapered wood screws on my old South Bend 
lathe is not the way forwards.

Any help in identifying suppliers - US or UK/Europe would be 
appreciated.  Now I may have asked this question before but as I still 
haven't managed to find any of these little screws......

Cheers,
            Clive