I discovered these a while back when I put 'special needs' in the search box on Ebay, looking for some bits for my DS.
There was someone who specialised in 'reborning' (dear god, that can't be in Collins, can it?) special needs dolls.
She had a whole NICU/SCBU of 'reborned' dolls with Downs Syndrome etc
The whole concept of them is odd, each to their own and all that.