I'm a GC so I don't do this but, off the top of my head, I would think you could create one or two custom fields on the Customer Setup in Accounts Receivable. Then modify one of your AR reports to add these custom fields as a column so you can see it when you run the report. 

Or, you could track it in Job Cost or Project Management on the job level using custom fields as well. 

If you have MyAssistant, you can create an alert to run once a week that would send you an email of all the OCIP's that are expiring in the next 30 days.

Hope this helps!