Would something like this work?
http://www.htamericas.com/media/downloads/pdf/PLC_Clips.pdf
http://www.htamericas.com/media/downloads/pdf/Flat_Ribbon_Clamps.pdf
Paul Korzenecki, P.E.
Plastics & Small Parts Automation Div'n
ACRO Automation Systems, Inc.
www.acro.com