If you have a 'test' copy of 7, you can use it to point to an old copy of the database (before the purge) and then use commands or DBT to be able to create the old structure in your production CA 7. If you don't have a 'test' copy of 7 installed, you can bring up a non-submitting CA 7. To be able to bring up a non-submitting CA 7 you will have to allocate files pointed to by the DD names (see your production CA 7 files for allocation information--they probably won't need to be a large for this test as they are for production):
UCC7IN
DBPARMS
CA7RSRC
CA7ARFDB
UCC7LOG
UCC7LOGS
UCC7QDMP
UCC7CMDS
UCC7STAT
UCC7IRDR
BTERM01I
BTERM01O
BROWSE
UCC7CKPT
UCC7SCRQ
UCC7PREQ
UCC7REQQ
UCC7RDYQ
UCC7ACTQ
UCC7PSTQ
UCC7PRNQ
UCC7TRLQ
UCC7DQTQ
In the UCC7IN member (initialization file), the INIT and SVCNO statements
INIT,RUNOPT=(MAIN),....
SVCNO,SASSVC=NO,CA7=MSR7
the CA7= can be any 4 characters
If you need further help with this, please open a new case in support online and we will be glad to help