How to retreive deleted expense reports

Hi,

Unfortunately Expense reports were deleted from the system when somebody deleted the HR mini master.This has reset /restart the Travel info type 017 and related expenses reports were disappeared from system.

Is there a way to get them back. They were not in archive , PTRV_HEAD,PTRV_PERIOD tables. Old reports are there in PTRV_DOC_IT.

Did anybody experienced this problem how did it get resolve.

Thanks in advance

Uma