<< no barebones kits that i'm aware of, a laptop is a bit tougher to pull off than a desktop, don't know if anyone here on the forums would have the skill to build one, even if you could somehow find the parts...
>>
Never seen a barebones kit here either.
I have put a couple together from scratch and it is a swift pain in the ass.
Maybe what I did is not considered 'building' a machine, but I dismantled some IBMs down to the case (to leave the S/N intact) and replaced all the components.
It would have been much more efficient to have just given the customer new machines.