Source for Cassette racks

Building a spinning vertical rack to hold audio/video media for the IL's.
Having trouble finding a vertical rack to hold cassettes horizontally.
So rack goes up and down and cassettes lay flat in slots
R-CASS-R R------R R-CASS-R R------R
The sources, Rockler, Woodworkers Supply, Lee Valley, all have short racks instead of a long tall one, and they are not recommended for vertical orientation.
Other sources out there?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.