Moving purchased inventory to give to supplier to finish an assembly

How do I account for several inventory items that we have purchased and entered into QB, but are now giving to a supplier to build a finished assembly item?  We were doing the builds inhouse so I have an assembly item that pulls each of the inventory items out to create the build. Now we are having the assemblies built by a supplier and have some left over quantity of a few items that we will give to them. They will then credit us per piece for the inventory items we supplied. I need to move the quantity of items out of my inventory and account for their value when we receive the finished product back.