I was trying to find those assets myself. Since the link is dead - someone may find this handy. I extracted them from the original .bsp file. All the credit goes to original author, obviously. Also, I'm not sure if it is the same pack as was provided by author, those are just models and textures from the map itself.
I emailed heyo, he sent me the original pack. I got his permission to put it up here. Hopefully nothing will happen to it now that it's hosted on-site.
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