Hi Skip,
I guess the easiest approach to achieve this goal is, if not CLI script, to write Java program utilizing Spectrum Web Services API (Restful API). We can check periodically for such un-acknowledged alarms and check their Create Date attribute. If it passed certain duration un-acknowledged, you can then create event to generate new alarm.
Please refer to
https://wiki.ca.com/display/CASP10/Using+Alarm+Resources
https://wiki.ca.com/display/CASP10/Events
For example for Java program, see Java Code and XML Examples - CA Spectrum - 10.0 - CA Wiki
Example files are located under <$SPECROOT>/RestfulExamples/src/test.