I've done some temporary mounts of the new Tangband W3-871s
on a small birch ply baffle.

The hardware store(s) I checke didn't seem to have any
black naoldized screws with round heads, si got some flathead
woodscrews which do not mound flush but looked to be about
the right size.

Is there someplace like McFeeley's that the right sort
of exact match screws for things like these speaks which
came with none... no docs either... can be found?

A dollar's worth of screws and $5 shipping or something.
There must be a better way/alternative.