Ah, sorry. Yes, true. Currently, you can't download these OSL textures directly in the Houdini plugin because it only supports material type liveDB nodes. I'll take a look at this limitation at some point, but meanwhile, you could open the liveDB OSL texture in the Standalone and copy/paste the OSL code into the plugin OSL VOP node, as you can see in the attached images.
Computer Graphics Software Developer
Octane plugin development and support: LightWave and Houdini