I'm looking to buy some compact disc racks made by a company called
"Sentry."  The racks I'm interested in can be mounted vertically or
horizontally and hold 48 discs in two columns (rows, if horizontal) of
24 discs each.  CDs are stored two per slot; there are 12 slots per
column (row).  The racks, which measure approximately 10.5 x 13 x 5
inches deep, can lock together to form larger blocks of storage.  The
only words on the racks are "TOP" and "SENTRY PATENT PENDING."

If I remember correctly, the manufacturer was located in Bronxville,
NY, but I may be wrong about that.

I seek the name and current contact information (address and phone
number, plus an optional URL) of the manufacturer, plus pricing for
the racks.  Failing that, I'd appreciate contact information for a
wholesale or retail source.

Could this be the company? It manufactures electronics equipment. It's
nine miles from Bronxville, NY. I just called the numbers, but it's
after business hours.

Sentry Industries Inc    
29 S Depot Plz
Tarrytown, NY 10591-3665
Phone:(914)332-1660 
Phone:(914)332-8588

Thanks, Darrel!

That is the company I was looking for.  I was mistaken: they had been
in Yonkers, not Bronxville, and they stopped manufacturing the CD
racks a year ago.  They told me that though they've received many
calls from people looking for their CD racks, they have no plans to
produce them again.

That answers my question, though it wasn't the answer I was hoping
for.