Would like square and flat files with unfinished sides. IE sides that don't remove  material.

Known as safe edges, that may help your search.

bought my small needle files at HF. safe edge, flat round curved, about 12 in all in the set

Brownell's sell some, and you can buy them from most jewelery supply houses.
Most of the jeweler's sizes will be smaller sizes, often no more then 6 inch cut.

One of the most useful types is the Hand file.  It's parallel on both sides and the edges.  In other words, unlike most files it has no taper.
A narrow version is the Pillar file.
At least one edge is always a safe edge, sometimes both are smooth.
If you need both, simply grind the cutting teeth off the other surface, keeping the file cool.

Go to page 183 for Grobbet Swiss Hand files.  These are recognized as the best files in the world.
They ain't cheap.

http://www.julesborel.com/images/julimages/pdf/ToolsCatalog2013/Tools%20Catalog%202013%20for%20Web%202-7-13.pdf

Brownell's sell mostly American cut files.  Not as good as Swiss but a lot cheaper.
They sell Hand, Pillar, Narrow Pillar, and Extra Narrow Pillar files.

http://www.brownells.com/gunsmith-tools-supplies/general-gunsmith-tools/files/hand-files-prod9574.aspx

http://www.brownells.com/gunsmith-tools-supplies/general-gunsmith-tools/files/standard-pillar-files-swiss-pattern-prod25659.aspx

http://www.brownells.com/gunsmith-tools-supplies/general-gunsmith-tools/files/american-pattern-hand-files-prod5182.aspx

This ^

Brownells  safe edges.

Is this what you want?

Make your own.
Safe sides that is.

yep, make a regular a safe on the grinder.  Don't over heat it.

McMaster

Thankya!