Greeting,
Hi there,i am engineer and product design,i am have several experience engineer and manufacture,i am very interested with your project,i can help you for convert your part from STEP yo OBJ,please share detail your filei can start work right now if you award me,will send best result ,i can provide format file you needs,as STEP,IGES,DXF,DWG,STL and etc,hope we can work togheter,thanks Dedy.e