There is no utility (e.g. Reconcile, Check Links) that will add records to the HITB (SEE30303) table for you. A SQL insert statement would have to be written to put the correct record into the SEE30303 table.
If there are a large amount of records missing, you may want to consider removing the current contents of the SEE30303 table and running the HITB IV Reset process. Doing this will cause you to lose the ability to go back to a previous date and review your inventory information using HITB, as the table (and therefore report) would be starting over with beginning balances from the date the IV Reset is run. However, if the current data is not correct, then this may be the best approach once the cause of the issue has been identified so that it can be avoided going forward.
If the IVIVINDX field in the SEE30303 for the record is 0, an update statement could be written and ran in SQL to update the field to the proper GL account index. Further reconciliation would need to be done to determine if a direct adjustment to GL would also need to be made.