Pretty much every backlit keyboard has a "soft touch" coating on the keys. So that includes the Razer BWU, Duck Shine II and YOTD, Qpad, Logitech G710+, etc. I think the CM storm QFR and Rosewill non-illuminated both have similar coatings on their keycaps.
It has to do with the enamel that they use to make the non-legend part black instead of clear.
The legend will last a pretty long time but they will shine like any other ABS cap.
I think that Ducky is supposed to release custom translucent legend keys soon, but other than that IDK any places you can just get the keycaps. Someone else here might.