Tata Nano CAD model for External Aerodynamic analysis -- 2

I want a CAD model of TATA NANO on which i can perform the External Aerodynamic analysis in Ansys. Model is available on Grabcad but it has several issues (gaps, holes, surface issues, etc). Please see if you can solve those issues and then only apply for this project. You can provide me with a CAD model of TATA Nano car and CAD model of Boolean operation performed Tata Nano ( Car subtracted from a cuboid for aerodynamic analysis). I am attaching the link of the CAD model. https://grabcad.com/library/tata-nano-1 . Try to solve the problems first then only apply. My budget is Rs 600