sure, I really like them too especially the different shapes, and original is always good. I just would hesitate to call a £200 lampshade "cheap enough".
Can anyone really claim to be the 'original' for paper lanterns, though - they've been being made since the 17th C. I'm not sure an unbranded one being sold cheap owes anything to Noguchi - it's not like a knock off Eames chair or something where the 'original' is responsible for design.
quite a few places sell simple paper and bamboo shades, I think I got some from John Lewis a few years ago