How to import field data as field source from matlab to CST

[sixsunss]

Hi,

I've used matlab calculate a EM field source as 140*140*40(in a volume), now I only want to use one layer of this data(a 140*140 2D matrix) as the field source in CST.
I have the information of x, y, z, Real(X) Imag(X) (X= Ex, Ey, Ez, Hx, Hy, Hz)

I only know they allow the following import formats :
CST MICROWAVE STUDIO field source monitor data (FSM files)
CST CABLE STUDIO or CST PCB STUDIO radiation data (RSD files)
ESF compact source data (ESF files).
NFS nearfield scan data exchange format (XML files)

Are there anyway I can transform the my matrix into any of the above file type?

Thanks!