It should be quite possible to convert CAD data from Parasolid formats (for example .x_t) ISO STEP product data format (.stp, .step).
The obvious choice for x_t to stp conversion would be Parasolid, but if you do not have access to the software you have to look for 3rd party alternatives. One of the best choices would probably be Autodesk Inventor that supports well both formats and can work with them. The other option would be to some some dedicated CAD conversion and data translation conversion program like the Cross Manager.