Converting an existing file here?

I am in need of some representation of a hydraulic scissor lift table of which I saw a few different options here. My question remains, how do I convert or make these files able to be opened in CATIA? Usually I am used to using a STEP file or .stp file that opens quite nicely in CATIA. It looks like much of the one model is aw was created in "SolidWorks".