SLA customization using Line description

Hi

We are in R12.1.3.  We have Header level & Line level modifiers in OM module to offer discounts to Customers.

And these discounts are being interfaced to AR invoices and they show up as separate line on the invoices.

As per standard functionality, both the List price line and discount line are getting accounted to the same revenue account.

Business requires that the Discount should be accounted to a different account for tracking purpose.

Request suggestions as to how to meet the above requirement ?  Assuming we have to do SLA customization.

However to do SLA customization also, the only identifier is the Line description, which is like "EOA_DISCOUNT_HEADER.18658485" or "EOA_DISCOUNT_LINE.18660239"