Cash on Delivery Payment Method Filterable by Pincode

This is for small Magento store for Indian Customer based and looking for a new features with Cash On Delivery implementation (COD). Though we already have a COD module already running as the payment option But the following function need to be developed - Admin will be able to select Pincode which are serviceable in the area across India as per country selected - Also admin will be able to add serviceable pin/zip codes. Pin codes in this list will be called serviceable and other non-serviceable. So if the customer's shipping address pin code is serviceable, the customer will see the active radio button of COD on the checkout page. Though if the shipping address pin code entered by customer is non-serviceable, the COD radio button will be dead or inactive and the customer will see a message 'This mode is not available for your shipping address'. Any alternate option related to this function are welcome Wish to run this function with a OneStep check out option module