How can I tell which 3D models have multiple file formats?

Some 3D models allow me to choose a format, but many others do not. Since I need VRML, so far, the only way I've been able to tell if a file gives me multiple formats is to click on the "Download 3D Model" button. Because it takes several steps to get there, and because many times that just downloads a STEP format file that I can't use, I'm thinking there must be a better way. But I haven't been able to find it. Please help.

Thanks

Doug