that's the pedestrian version. try $1700 for 3d printed ti. $1700. for two pulley wheels and a derailleur cage.
http://www.ceramicspeed.com/sport/product.aspx?catalog=24&category=OSPW&product=1082&sku=3D Printed OSPW
if you're a cheap ass bastard, you could slum it and just drop standard size pulleys in your slx mech for a cool $1k:
http://www.ceramicspeed.com/sport/product.aspx?catalog=24&category=PulleyWheels&product=612&sku=PW 3D Hollow Ti Shimano 11s CO
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