If I recall, they mass produced low quality 'clone' templates from biomass - which is collected from plants, animals and human corpses. The higher the quality the more bits of real human. Then they sculpted it to look like you. I don't think your brain was even a real brain but instead something like a Gel-Matrix Biopaste with Synthetic Synapses.
Which was why it was important to keep genetic material on hand for when you were finally rich enough to pay for the highest quality clones which was an actual clone of yourself. It was also why Hamish gave expecting young capsuleers a raised eyebrow.
If the drifters don't have real bodies to start with...they'd need corpses, or at least somebodies DNA to grow from. Someone said they don't collect low-sp characters, which I doubt is true, but if it was that would be an interesting twist.
Either way, for the safety of the human race we need to lock up that Kruul freak before they get a hold of him and his endless supply of 'DNA.'