Source inspection before 365 days of delivery date of purchase order

Hi Experts,

Business wants to create source inspection lot well in advance before 365 days of delivery date of purchase order. this lot is required to record results.

In SAP, transaction code QA51 allows only two digit characters for 'number of days for opening period' so system is not creating inspection lot for more than 99 days delivery date from current date.

Please advise.