Bought from Taobao as I am too lazy to make one (or make 3, rather...) for my NA seekers using my old PT seekers. Costs about SGD10 each pair, including shipping... I remember ebay (Japan???) also got sell, as informed by 1 blog viewer... The grey, blue and black colours are painted over the dark rey 3D printed material. The blue and black still looks quite ok, but the grey colour does not match that of Lucifer's (Starscream's). Yeap, have to agree it is quite expensive, and the kit only shows well in jet mode which I am not displaying them in... but still, I am too lazy to make them myself...