There is a PDF of a 2003 Matrix parts catalog here at
http://www.genvibe.com/images/misc/manu ... atalog.pdf
In the middle of page 2 of that PDF (page 1174 of some unspecified huge volume), in the AC/HEATER?VENTILATION section, the clamps are identified as:
6. Clamp, Evap Pipe 88718-02170
14. Clamp, Suction Hose 88718-02160
a quick google shows both are available for purchase at multiple sites