That looks like my "KRB" Bluepoint box,going by how the sides of the box are made.The slides all say SO.The drawer pulls are rounded off,instead of 90 deree edges,etc.
The label says made in Canada.I always thought it was from the same maker that made the KRA boxes.I've never had a problem with it.If parts are NLA,I'll be bummed!
Maybe ask SO if the parts for a KRB unit is avail? If you pull out a drawer,do they have the latch tang in the back? With some work,it would be possable to homemake the latches and the long column that has the square cutouts for the latches to engage.
That front-locking bar looks like the one that SO has always shown in their catalog.
I found a way to install the aluminum trim on the rounded-off drawers so it matches the KRA units.Looks way better with the trim,I think.
Steve