non valuated sales order stock vs valuated

When we went live in 1999 we used non-valuated sales order stock for our MTO process.

I really need to create and save cost estimates for configurable material (an average build) using CK51n. It does not work with non-valuated stock.

Does any know if I can some new part numbers be valuated while the standard process stays non-valuated? A new material type with new rules??

I wasn't here in '99 so I don't know what was involved in setting it up, nor in changing it