It only took 3 years... But I finally have Radiolarian I, Radiolarian II, and Radiolarian III available for sale in my Shapeways shop:PuzzleForge on Shapeways
They've been optimized into a small print area so that they get a nice discount, and they are also small enough prints that they are eligible for polishing, which I reccommend.
Prices in WSF unpolished:
Radiolarian I = $250
Radiolarian II = $299
Radiolarian III = $299