Order Fulfillment in Multiple UOM's

 All,
Our client has requirement to transact in multiple units of measure during order fulfillment process. They want the ability to transact in Ordered UOM which could be different then the primary or secondary UOM of the item. Both in Move Orders form and Shipping Transactions form, it only gives the ability to transact in either the primary or secondary UOM. Any thoughts on achieving this?

Thanks,
Narsy