There was someone in the US making them and selling them. Can't remember all the details now, but if you have a bit of a search around you should be able to find something, or maybe one of his happy customers can help you out with more details

(list 6284, Mk1 S/N 00299 4GB blue [for sale]. Mk2 S/N 080000094 6GB blue)
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)