I am looking for a business to business company that will sell me
commercial grade Mini Replacement Bulbs with sockets but without the
string they are usually attached to (as in a christmas tree string
bulb
and socket) that has a 200milliamp output at about 5volts. I want to
buy large quantities.

You may need to buy the sockets with a few inches of wire attached, as
I suspect making reliable connections to the socket after the plastic
is molded is difficult. Your best bet may be to buy the fully
assembled light strings and cut them apart. I have seen seen them at
retail for less than two dollars for a string of 100 lights. I think
you are correct that 5 volts at 200 ma is typical, but some can only
tolerate 4 volts, and I think the current also varies depending on the
manufacture. 3 or 4 volts is better if you want long life.  Neil