He reskinned it to match the ground and ballast textures around it. I don't see why it would be unreleasable without proper permission. Why don't you ask JR?
Well my friend, its....JR ;-) I do not ask, i can give me the "no permission" myself...
@pdkoester: Its JR Concrete 1, but heavily reskinned so it looks realistic (coal dust and dirt + we are in a desert region). Replacing it with the original looks like ****, sorry man
2nd: Yep those kuids will be replaced
@applegathc, thanks and have fun with it