Need Custom Source SLA

Hi Experts,

We have 2 Ledgers, I.e Primary Ledger & Cash Ledger.

I need a Custom Source for Cash Ledger where for the below requirements. Please advise

1. For Cash Ledger, we need payment Entry as shown below (No-reconciled entry should Hit Cash Ledger)

Required Entry
For a Po Matched Invoice, Invoice entries should not be transfered to Cash Ledger, only Payment entry should be Transferred to Cash Ledger
Expense	DR
Bank A/C	CR

Required Entry
Expense	DR
Bank A/C

Expense account should pick from PO charge account and Credit account from Organization Bank cash account . For Non PO Invoices expense account should be from Invoice distribution.