With this kind of look in mind?
You could probably do it by swapping the Archon's arms for some outstretched ones, using some unobtrusive wire or a spare flying stem (or part thereof) to hold his feet up, and maybe some greenstuff freestylin on the chest to represent the runic armour?
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The Dark Eldar and Dissynergy.
3d printed Dark Eldar bits on Shapeways.