PSFT - Grants / Project Costing - Repricing

My question has to do with repricing a BIL row in Project Costing that has cost row. There are numerous grants that we bill on quarterly basis. Many of our rate sets / rate plan produce both a cost row and a bill row. It is very common for the cost row to sent to GL (GL_DISTRIB_STATUS = D) in let's say July and the BIL row would need to repriced at a different rate than originally priced in October. According to PeopleBooks, the BIL row will not be re-priced because the cost row had gone to GL.

We have considered some alternatives (1) Separating the Cost Rate Sets from Billing Rate Sets. (This would be a huge change for us.) (2) Possibly customizing the Pricing program to ignore the GL_DISTRIB_STATUS of the cost record. or (3) Creating a Repricing Analysis Type and 'Add a New Transaction' into the PROJ_RESOURCE then rate set would create a new BIL row that could be priced.