How can we link tax invoice number in AR transactions to the supplly type?

Summary: India tax invoice number should be linked to the supply/transaction type

Content (please ensure you mask any confidential information):

We have the following requirement-The tax invoice number on AR invoice should start with the initial of pertaining Legal Entity followed by the state initials, supply type and the number.For e.g. In case of an export sale for Karnataka LRU- LE/29/EX/1, LE/29/EX/2 and so on.In case of FA sale invoice for Delhi LRU- LE/07/FA/1, LE/07/FA/2 and so on.We are able to achieve the prefix LE/07/1 through 'Manage Localization Document Numbering' but need inputs as to how we can link it to the supply/transaction type.